(a) the force of kinetic friction in case 1 is equal to the force of kinetic friction in case 2. (b) because the normal force is the same in the two cases, and friction is independent of surface area.
How does kinetic and static friction differ?Kinetic and Static Friction The friction that exists between two systems when they are in touch and immobile with respect to one another is concerning as static friction. Kinetic friction is friction that occurs when two systems are in contact and moving about one another.
What factors affect kinetic friction?There are just two variables that affect the kinetic friction force acting on a moving object: the normal force and the coefficient of friction between the two surfaces.
Is kinetic friction consistently favorable?Motion is constantly resisted by kinetic friction. As a result, it always behaves in the opposite direction of motion and is therefore negative with regard to the surface.
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What is the magnitude of vector A 3i?.
The magnitude for the vector 3i is 3.
Magnitude is a "distance or else quantity," according to the definition given in physics. It shows how an object moves when it is in motion, whether that movement is absolute, relative, or of a certain size. It serves as a way to describe something's size or scope. Magnitude is a broad term used in physics to describe size or distance.
A force's strength is quantified by a number called its magnitude. Take a force of 10 N, for instance, in the direction of the east. The phrase "towards east" denotes a direction, and "10" represents the force's magnitude. In other words, magnitude can be thought of as the "value" or "amount" of any physical quantity.
Magnitude of a vector 3i is:
M = [tex]\sqrt{9} \\[/tex]
M =3
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How 1 kilogram is equal to 9. 8 N?.
The force needed to move an object has a high N value when its mass is large in kg, 1 kg weight in this case equals 9.81 N or 1 kg=9.8N.
We know that,
F =mg
F = 1kg ×9. 8 N
F = 9.8N
The kilogrammes, or simply kg, is a unit used to measure an object's mass in the international systems of units (SI unit). Newton, or simply N, is a unit used to measure force in the international systems of units (SI unit).
The kilogram and newton have a straight proportional connection.
Since When an object has a low mass in kg, it also has a low force in N needed to move it.
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How do you solve force in Coulomb's law?.
Why do we measure torque?.
Modern engines need to deliver improved mechanical performance, and torque measurement helps them do this by increasing their accuracy and speeding up its rotation speed for efficiency assessments, some examples are:
Optimize Fuel Efficiency (Marine Industry)Load ManagementHigh/Low Torque AlarmDiagnosticsPredictive MaintenanceAccuracy explanation: What is it?The degree to which a measured value resembles a reference or well-known value is referred to as accuracy. For instance, if you measure a substance's weight in the lab and come up with a reading of 3.2 kg when the true or actual weight was 10 kg, your reading is inaccurate. Your measurement in this instance is quite far from the value that is already known.
What level of measurement precision is there?The more traditional expression is "accuracy of measurement," which is defined as "... the degree to which the outcome of a measurement agrees with the true value" on an international scale.
How torque is useful?Depending on the engine speed, both engine power and torque are indicators. Effective and energy-saving driving is made possible by high torque. Fast acceleration and a high top speed are made possible by an engine with high power.
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An SUV with a surface area of 27 square meters travels at 35 meters per second. What is the drag if the car has a drag coefficient of 0.6 and the air density is 1.3 kilograms per cubic meter?
12,899 N
33,538 N
9,951 N
25,799 N
The drag force on the SUV is 12,899.25 N.
option A is the correct answer.
What is the drag force of the SUV?The drag force if the car has a drag coefficient of 0.6 and the air density is 1.3 kilograms per cubic meter is calculated as;
F = ¹/₂ρv²CA
where;
ρ is density of airv is the velocityC is the drag coefficientA is the surface areaThe drag force on the SUV is calculated as follows;
F = ¹/₂ x ( 1.3 kg / m³) x ( 35 m/s )² x ( 0.6 ) x ( 27 )
F = 12,899.25 N
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What is the SI unit of length 6 Mcq?.
A meter is the metric system's standard unit of length (m). One meter (m) is divided into 100 equal centimeters (cm).
What is SI unit?The International System of Units, abbreviated SI in all languages and sometimes pleonastically as the SI system, is the modern version of the metric system and the world's most widely used measurement system. The SI is a coherent system of measurement that begins with seven base units: the second (symbol s, the unit of time), the metre (m, length), the kilogram (kg, mass), the ampere (A, electric current), the kelvin (K, thermodynamic temperature), the mole (mol, amount of substance), and the candela (cd, luminous intensity). These are widely accepted and followed around the world. The SI unit for mass is kilogram, the SI unit for length is meter, and the SI unit for time is second.
Here,
A meter is the standard unit of length in the metric system (m). One meter (m) is equal to 100 centimeters (cm).
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What are the two ways ATP is produced during respiration?.
Cellular respiration is like a battery charger if ATP is like a battery. Substrate-level phosphorylation and oxidative phosphorylation are the two mechanisms used by our cells to produce ATP.
Plants possess three. They generate ATP when photosynthesis is taking place by using solar energy. During aerobic cellular respiration, glucose and oxygen combine to create ATP, which the cell can utilise. As byproducts, carbon dioxide and water are produced. The general equation for aerobic cellular respiration is: ATP is produced when glucose and oxygen combine in cellular respiration.
Glyceraldehyde-3-phosphate 1,3 diphosphoglycerate results in the first generation of ATP. Second, when phosphoenolpyruvate breaks down into pyruvate, ATP is created. For each of the two 3-phosphate molecules, these processes happen twice. Thus, during glycolysis, a total of 4 ATPs are created.
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It takes a train going 50 mph approximately ____ to stop safely.
a. 100 feet
b. ½ mile (9 football fields)
c. 1 ½ miles (26 football fields)
d. 5 miles (88 football fields)
It takes a train going 50 mph approximately 1 ½ miles (26 football fields) to stop safely.
The total stopping distance is the distance traveled by the vehicle from the moment the driver detects danger and steps on the brake until the vehicle comes to a stop.
The easiest way to calculate total stopping distance is to use the 3 second rule. When safe and legal, a U-turn allows a driver to turn a vehicle in a lane, side street, alley, or driveway. A 3-point turn is a safer way to change direction than a 2-point turn.
Stopping distance is the distance from when your body decides to stop a moving vehicle to when it comes to a complete stop.
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define the relationship between the ecg and the pulse wave. explain why the timing of the qrs complex in the ecg and the start of the pulse wave do not coincide.
The ECG (electrocardiogram) records the electrical activity of the heart, while the pulse wave is the physical manifestation of this activity that can be felt at the wrist or neck.
The timing of the QRS complex in the ECG and the start of the pulse wave do not coincide because the electrical activity propagates through the heart before the mechanical contraction of the heart muscle.
The QRS complex in the ECG corresponds to the depolarization of the ventricles, which is the electrical signal that triggers the mechanical contraction of the heart muscle.
The ECG records the electrical activity of the heart, which is faster than the mechanical contraction of the heart muscle. The pulse wave is the physical manifestation of the mechanical contraction of the heart muscle, which can be felt at the wrist or neck.
The pulse wave travels through the blood vessels to the surface of the skin, which takes some time. Therefore, the timing of the QRS complex in the ECG, which represents the electrical activity, and the start of the pulse wave, which represents the mechanical contraction, do not coincide.
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when boating on federally controlled waters in an 18-foot boat, what equipment are you legally required to have on board?
When boating on federally controlled waters in an 18-foot boat, you are legally required to have certain safety equipment on board.
This includes a life jacket or personal flotation device (PFD) for each person on board, a throwable flotation device such as a ring buoy or cushion, and a fire extinguisher.
Along with that, sound-producing devices such as a horn or whistle, navigation lights for use during night time and restricted visibility conditions, and a visual distress signal such as a flare or flag.
Additionally, boats with a motor must also have a backfire flame control device and a ventilation system if the boat is equipped with an enclosed engine compartment.
It is also strongly recommended to have a first aid kit, a marine radio, and a signaling device such as a mirror or flashlight on board.
It's important to check with local authorities as well as the boating laws of the state you are in as they may have additional rules. Failure to have the required equipment on board can result in fines and penalties.
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What best explains a parallel force?.
A parallel force is a force that acts in the same direction as the motion of an object. The best explanation for a parallel force would be Newton's laws of motion. According to Newton's first law, an object at rest will remain at rest, and an object in motion will continue in motion in a straight line at a constant speed unless acted upon by an unbalanced force.
Therefore, a parallel force, acting in the same direction as the motion of an object, will increase or decrease the speed of the object but not change its direction of motion.
Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to its mass. A parallel force will cause acceleration, that is a change in the velocity, of the thing. The greater the force, the greater the acceleration, and the smaller the force, the smaller the acceleration.
This means that if an object is already moving in a certain direction and a parallel force is applied, the object will accelerate in that direction.
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Calculate the speed of the car at each checkpoint by dividing the distance between each checkpoint, in meters, by the change in time. Record your answers in table e of your student guide.
Speed is calculated as distance times speed. You need to be aware of the units for distance and time in order to calculate the units for speed. 1, 09, 1, 95, 2, 37, and 2, 80 m/s.
What is change in distance divided by change in time?Distance travelled divided by time equals rate of position change, often known as speed. By multiplying the distance travelled by the pace, you can find the time. For instance, Cole would have driven for 5 hours if he drove his automobile at a speed of 45 km/h and covered 225 km.The rate at which velocity changes is referred to as acceleration. As a vector, velocity has both a magnitude (a numerical value) and a direction.Acceleration is calculated by dividing the velocity change by the time required for the change to take place. The clock's speed, or how quickly a repeated cycle may be completed, is the only measure of the passage of time.To learn more about distance refer to:
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What is the potential energy of an object that weighs 20 kg and is 8 m from the ground?.
Joules (1568) provide the potential energy.
Based on the force exerted on the two objects, the potential energy equation is determined. P.E. = mgh, where m is the mass in kilograms, g is the acceleration caused by gravity (9.8 m/s2 at the earth's surface), and h is the height in meters, is the formula for gravitational force.
As a result of an object's position in relation to a zero position, potential energy is, in essence, the energy that is contained in the object. An object has gravitational potential energy if it is positioned at a height above (or below) the zero height.
Here m=20 kg
height h=8m
g= 9.8
Potential energy (P.E) = mgh
Potential energy (P.E) = 20*8*9.8
Potential energy (P.E) = 1568 J
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The series is shown in over 100 countries. About 300 million people watch it every day. This makes The Bold and the Beautiful the most watched television series in the world. The first episode was shown on March 23, 1987 on the CBS network. The series was created by the soap opera writer William J. Bell and his wife, Lee Phillip Bell. It is the only American soap opera to have its daily episodes translated into Spanish for the Hispanic viewers in the United States. The series is set in Los Angeles, California. It tells the story of the Forrester family, who owns a fashion empire called Forrester Creations. The major members of the family are Eric Forrester (played by John McCook), the president of Forrester Creations, his wife Stephanie (Susan Flannery), their eldest son Ridge (Ronn Moss) and Brooke Logan (Katherine Kelly Lang), who was married to both the father and the son. She owns most of Forrester Creations. This is because she created BeLieF, a formula which earned much money for the company. There used to be a second fashion company called Spectra Fashions. It was Forrester’s main competitor. The conflicts between the Forrester and the Spectra families was one of the major themes of the story.
More than a 100 nations broadcasted series. The Bold and the Beautiful teasers for the upcoming CBS soap opera hint at more conflict.
What does the earth's horizon look like?The line dividing the Earth's surface from the sky is known as the horizon. Earth-sky horizons and celestial horizons are the two basic categories of horizons. There are various sub-types of horizons for both Earth-sky and celestial horizons. Earth-sky horizons include the local horizon, regional horizon, and sea level horizon.
What is the horizon that is lit?The particle horizon, also known as the cosmological horizon, comoving horizon, or cosmic light horizon, is the furthest a particle's light may have travelled before reaching an observer during the early universe's history.
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How to calculate weight from mass and gravitational field strength?.
What is ballistic stretching in your own words?.
By bouncing into (or out of) a stretched position while using the extended muscles as a spring to pull you out of the stretched position, you are stretching or "warming up."
For instance, repeatedly bouncing down to touch your toes. Stretching in this way is thought to be harmful and risky for injuries. In that it is movement-based, ballistic stretching is comparable to dynamic stretching. You strive to extend a bodily part's range of motion rather of extending it all the way to the limit.
Reaching over to touch your toes and bouncing to enhance range are two examples of ballistic stretching. Due to the risk of injury and lack of benefit compared to other, safer forms of stretching like PNF and dynamic stretches, this sort of stretching is rarely advised.
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PLEASE HELP RN
A ball is thrown horizontally at 7.7 m/s from the top of a hill 59.6 m high. How far from the
base of the cliff does the ball hit the ground?
The horizontal distance dx is calculated using the formula dx = vx * t, where vx is the ball's speed in meters per second and t is the duration of its flight.
How do you calculate the horizontal ball throw's speed?The horizontal velocity is calculated by dividing the horizontal displacement by time. In this case, Vx is equal to 4 meters per second.
How do I figure out the range?To get the range, locate the greatest observed value of the variable and deduct the least observed value (the minimum).
t_flight = t_fall
h = 0.5 * g * t^2
59.6m = 0.5 * 9.8 m/s^2 * t^2
t^2 = 59.6 m / 4.9 m/s^2
t^2 = 12.1632
t = 3.48s
Solving for the horizontal distance dx
dx = vx * t
dx = 7.7m/s * 3.48s
dx = 26.7m
The ball hit the ground at 26.7m from the base of the cliff.
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Is mass a force in physics?.
Mass is not a force in physics. The amount of matter that makes up an object is expressed by its mass, which is expressed in kilogrammes.
Even though the terms force, mass, and acceleration are usually employed incorrectly. Force is a physical phenomenon that, when applied to an item, causes it to accelerate in the direction from which the force was applied. The amount of matter that makes up an object is expressed by its mass, which is expressed in kilogrammes.
Acceleration is the rate at which an object's velocity alters while moving in the same direction as the unbalanced force. When the forces are in balance, there is no net force and hence no movement. The Newton's second law, which also concerns how an object moves, connects these three ideas.
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What is the magnitude of 3i 4j?.
Magnitude of 3i + 4j is 5 unit.
A vector's length, or magnitude, is its most fundamental physical characteristic. As a symbol, ∥a∥ stands for the magnitude of the vector a.
Using the components and Pythagoras' theorem, you may determine the magnitude of force vectors. Imagine the x-coordinate of the force as the base of a triangle, the y-coordinate as the height of the triangle, and the total force as the hypotenuse.
To find the magnitude, we can use this following formula:
∥a∥ = √ ( a₁² + a₂² )
in this case, we are given that:
a₁ = 3
a₂ = 4
Hence, the magnitude is
∥a∥ = √ ( a₁² + a₂² )
∥a∥ = √ ( 3² + 4² )
∥a∥ = √25
∥a∥ = 5 unit
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What is the equation which relates torque to force and lever arm?.
The lever arm is defined as the perpendicular distance between the axis of rotation and the force's line of action. torque τ = r × F
What's the connection between torque and force?Torque is a form of force applied to an item that causes it to rotate around an axis. Force is an action that alters the motion of an item.
A three-newton force applied two metres from the fulcrum, for example, produces the same torque as a one-newton force applied six metres from the fulcrum.
Torque is used by levers to help humans lift or move items. Torque is defined as the product of a force and its distance from a fulcrum.
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Determine the magnitude of the resultant force and its direction, measured counterclockwise from the positive x axis.
Point P moves counterclockwise around the circle, starting from the positive x-axis. Its angle is 90° when it reaches the positive y-axis (one-fourth of the way around the circle).
Its angle is 180° when it reaches the negative x-axis (and is now halfway around the circle). A combined force that is smaller than either individual force is created when two forces engage in opposition to one another. Subtract the magnitude of the smaller force from the magnitude of the bigger force to determine the resultant force. The smaller force and the resultant force both have the same direction. The x-axis and the y-axis are perpendicular axes in this case. We have the angle that the vector makes with the x-axis.
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what type of magnet is used for the coil in a relay?
A relay typically uses an electro magnet as the coil. When an electric current flows through the coil, it creates a magnetic field that can actuate the relay's internal mechanism to close or open a switch.
What is function of electromagnet inside a relay?An electromagnet is a type of magnet that creates a magnetic field using an electric current. The electromagnet performs multiple roles in a relay. The electromagnet's primary job is to activate the relay's internal mechanism, which makes it possible for the switch contacts to close or open in response to an electric current flowing through the coil.
The armature of the relay, which is in charge of closing or opening the switch contacts, can also be attracted to or repelled by the electromagnet. Additionally, it serves as a control input for the relay, which helps to regulate power signal. Galvanic isolation between the two circuits can be achieved by using the electromagnet to isolate or separate the control circuit from the load circuit.
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How are torque the moment of inertia and Newton's second law for rotational motion related?.
Newton's second law for rotational motion tells us that angular acceleration is directly related to the net torque and inversely proportional to the moment of inertia.
Mathematically, it is given as, τ = I α
where, τ is torque, I is moment of inertia, α is angular acceleration
Moment of inertia is described as the resistance to the change in rotation. It is given by the formula, I = m r², where m is mass and r is radius
Torque is nothing but the force and lever arm that can cause an object's rotation. It is also called as moment of force. Its SI units are N.m.
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What is 20 newton force?.
20 Newton force is the force which can cause 1 m/s² acceleration in a body of mass 20 kg.
By the second law of Newton, force is defined as the time rate of change of momentum in a body. In other words a force can accelerate a body having some mass.
F = (m₁v₁-m₂v₂)/Δt
Where F is the force, m₁ & v₁ are the initial mass and velocity of the object and m₂ & v₂ are the final mass and velocity of the object.
Or, F = mass × acceleration
The SI unit of force is kg-m/s²or Newton. We can say that a force of 20 Newton can produce an acceleration of 1 m/s² in a body of 20 kg. Or it can produce a 4 m/s² acceleration in a body of 5 kg mass.
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What is gravity year 7?.
The force that draws things together is gravity. It is the force that attracts anything in the direction of the earth's center.
The mass of the items and the separation between them determine how strong gravity is. An object's gravitational pull is stronger the more mass it has.
The gravitational attraction between two items decreases with increasing distance. Because of this, an object drops to the ground when you drop it.
You are drawn into the middle of the planet by gravity. In addition, gravity plays a role in the development of galaxies as well as other huge formations in space, as well as maintaining planets as well as other heavenly bodies in orbit around the Sun.
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What is the formula for the mean of the sampling distribution of p?.
The population proportion, sometimes referred to as sampling distribution mean of p is a statistic of central tendency that expresses the average value of a group of sample proportions.
The formula for the mean of the sampling distribution mean of p is given by:
μp = p
where "p" is the population proportion. This formula states that the mean of the sampling distribution of p is equal to the population proportion. This is known as the "Law of Large Numbers" which states that as the sample size increases, the sample proportion will become closer to the population proportion.
It is important to note that this formula assumes that the population is large, and the sample is random and taken from the population, so that the sample proportion will serve well for an approximate value of p.
This formula is also based on the assumption that the sample is large enough that the Central Limit Theorem applies, which states that the sampling distribution is estimated to be normal despite population distribution shape.
In summary, the formula for the mean of the sampling distribution of p is μp = p. It states that the mean of the sampling distribution of p is equal to the population proportion. This formula is based on the assumptions that the population is large, the sample is random and large enough, and the Central Limit Theorem applies.
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A 1355 kg roller coaster car starts rolling up a slope at a speed of 18 m/s
The maximum height reached by the roller coaster is 16.53 m.
What is maximum height reached by the roller coaster?
The maximum height reached by the roller coaster is calculated by applying the principle of conservation of energy.
potential energy of the roller coaster at maximum height = kinetic energy at the lowest point
P.E = K.E
mgh = ¹/₂mv²
h = ( v² ) / ( 2g )
where;
v is the speed of the roller coaster at the lowest pointg is acceleration due to gravityh = ( 18² ) / ( 2 x 9.8 )
h = 16.53 m
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What is work write its SI unit and formula and example?.
Work is a unit of energy that results from exerting a force on the body that causes it to move. The formula W = F s cosθ denotes work done, where F denotes force applied, s denotes displacement, and = Angle between force and displacement. Joule is the SI unit of work.
What is work?Work in physics is the energy transferred to or from an object by applying force along a displacement. In its most basic form, work equals the product of force strength and distance traveled for a constant force aligned with the direction of motion. Work is the transfer of energy caused by a force acting on an object as it moves. The work done by a force on an object is calculated as the product of the magnitude of the force multiplied by the magnitude of the displacement multiplied by the cosine of the angle between them.
Here,
Work is a type of energy that is produced when a force is applied to the body, causing it to move. Work done is denoted by the formula W = F s cosθ , where F denotes force applied, s denotes displacement, and = Angle between force and displacement. The SI unit of work is the joule.
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Of the five zones to consider when discussing human fitness which do you believe is the most important and why do you believe this
I believe the most important zone is cardiovascular, as it is essential for maintaining a healthy heart and lungs.
why human fitness important? Human fitness is important for several reasons. Firstly, it helps maintain good physical health. Regular physical activity helps to strengthen bones and muscles, reduce the risk of heart disease, maintain a healthy weight, and reduce the risk for other chronic diseases. Secondly, fitness can improve mental health. Exercise releases endorphins, which can reduce stress, improve mood, and increase self-confidence. Additionally, fitness can help improve cognitive functioning. Research has shown that physical activity can improve focus and concentration, and can lead to better academic performance. Lastly, regular physical activity can help improve sleep quality. Exercise can help people fall asleep faster and stay asleep longer, leading to increased energy and alertness during the day. In conclusion, human fitness is important for physical, mental, and cognitive health. Regular physical activity can lead to a healthier and happier lifestyle.To learn more about human fitness refer :
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PLEASE HELPPPP!!!! I NEED THIS DONE IN UNDER 3 DAYS!
Answer:
Question 7 is "Weight force down is greater than the air drag"
Question 8 is "600 N"
Explanation:
Question 7: When looking at the forces acting on the skydiver it's important to look at what force is larger, in this case, it's the weight. If two forces are acting in opposite directions, then the body will move in the direction of the force that has a larger value, 735 N.
Question 8: When the question tells you that the forces should be balanced, it means that they should turn out to equal zero if you were to subtract the forces, or you can think of it as trying to get the side that has a smaller number to be equal to the number that is greater. Since the question specifically says the parachute will ADD drag to the equation, you solve this one by asking yourself "What number + 135 will equal 735?" This ends up being 600 N.
Hope this helps!
