A student’s backpack, full of textbooks, is hung from a spring scale attached to the ceiling of an elevator. When the elevator is accelerating downward at 3.8 m/s2 , the scale reads 60 N. (a) What is the mass of the backpack? (b) What does the scale read if the elevator moves upward while speeding up at a rate 3.8 m/s2 ? (c) What does the scale read if the elevator moves upward at constant velocity? (d) If the elevator had no brakes and the cable supporting it were to break loose so that the elevator could fall freely, what would the spring scale read?

Q: A force of 32 N, parallel to the inclined plane, is necessary to make a crate rise, with constant…

A: Force applied on the crate=F=32 N Angle the inclined plane makes with the horizontal=θ=30∘ We have…

Q: An 80 kg person is standing on a scale in an elevator. Find the weight that the scale reads when the…

A: The answers are below

Q: What is the normal force exerted by an elevator on 55kg person if the elevator is moving upward at a…

A:

Q: An apple weighs 1 N. The net force on the apple when it is in free fall is   answer choices  0 N.…

A: Third option (1N) is correct. Explanation-  Given that, Weight of apple (w) = 1N Since, we know…

Q: A high jumper with a body weight of 820 N exerts an average vertical force of 1640 N down on the…

A: Given  Force applied by jumper on floor F=1640 N  Time t=0.75s Weight w=820N

Q: An object of mass 4 kg originally suspended by a vertical cord is pulled by a horizontal force until…

A: Write the given data. m=4 kg In this case, if system is at rest then the tension in cord will be…

Q: A force of 15N is applied to a box in the positive horizontal direction, moving the box at a…

A: Given that the value of force and coefficient of friction.Then We have to determine the mass of the…

Q: A man weighing 800 Newtons is standing in an elevator. If the elevator rises with an acceleration of…

A: Weight of person , W = 800 N  Acceleration of elevator , a = 0.5 m/s2  Mass of person , m = W/g  g…

Q: A person who normally weighs 700 N is riding in an elevator that is moving upward but slowing down.…

A: Since the elevator is moving upward but slowing down that means the person standing in the elevator…

Q: You are standing in an elevator in a tall building. Your mass is 65 kg. The elevator starts at t = 0…

A: Given Position y(t) = (0.75 m/s2)t2+(0.10 m/s3)t3 Time t = 4.0 s mass m = 65 kg

Q: A box of mass 40 kg, initially at rest, is pushed by a horizontal force of 200 N for 6 sec. The…

A: Given Values -  Mass of box (m) = 40 Kg  Horizontal force = 200 N  Friction force = 20 N  Time (t) =…

Q: At 560 metric tons, the Airbus A-380 is the world’s largest commercialairliner. What’s the upward…

A:

Q: Suppose you had a 5.00 kg sack of sugar and a bathroom scale. If you took the scale into an elevator…

A: Given data: Mass of sack of sugar, m=5.00 kg Acceleration of the elevator, a=1.00 m/s2  The mass…

Q: A 25 N weight box is pulled by (F=22 N) on a horizontal surface, determine the acceleration of the…

A: Weight, w = mg = 25 N  Applied force, F = 22 N  Coefficient of friction, µ = 0.3

Q: The parachute on a race car of weight 8010 N opens at the end of a quarter mile run when the car is…

A:

Q: A skydiver of mass 72 kg has jumped out of a plane 2 km above the surface of the earth. After 20…

A:

Q: What horizontally applied force will accelerate a 400-kg crate at 1 m/s2 across a horizontal factory…

A:

Q: Car A (mass = 1000 kg) was subjected to a horizontal force of 10,000 N to allow it to move along…

A: Given data:  Mass of car A (ma) = 1000 kg Force on car A = 10,000 N Frictional force on car A = 3000…

Q: A tractor pulling two trailers, M1 and M2, with a constant acceleration. T has a mass of 200 kg, M1…

A: Given data: The mass of tractor is T=200 kg. The mass of trailer 1 is M1=100 kg. The mass of…

Q: A body hangs from a spring balance supported from the roof of an elevator. If the elevator has an…

A:

Q: A 100-kg man stands in a moving elevator. Calculate the force exerted by him on the floor for the…

A: Solution: Given that m = 100 kg find teh force on floor  a). The elevator has a constant upward…

Q: You want to hang an object from the ceiling of an elevator that has a maximum acceleration of 4.0…

A: Given :-  acceleration = 4 m/s2 F = 45 N

Q: A Boeing 707 jet aircraft has a takeoff mass of 1.2 x 10 kg. Each of its four engines has a net…

A: Given data: v=73 m/su=0F=75 kNm=1.2×105kg Need to determine the acceleration and distance.

Q: A man weighing 800 Newtons is standing in an elevator. If the elevator rises with an acceleration of…

A:

Q: The bottom of a freight elevator has a scale that measures the normal force between the floor of the…

A: Write the given values with suitable variables. m=450 kga=1 m/s2 Here, m denotes the mass and a…

Q: As part of a physics experiment, you stand on a bathroom scale in an elevator. even though you…

A: Given Actual weight W = 704 N Apparent weight W' = 894 N Acceleration a = 2.65 m/s2 , upward

Q: You know your weight is 680 N, but when you stand on a scale in an elevator it tells you that your…

A: Given:- Actual weight = 680 N Weight in elevator = 600 N The weight measured is less than your…

Q: hover puck has a mass of 1375 g, photogate 1 is at the 20 cm mark, photogate 2 is at the 70 cm mark,…

A:

Q: 506,000 kg. It can supply an upward force of 5,885,000 N. How long would it take the rocket to reach…

A: Apply Newton's laws of motion

Q: An object is propelled along a straight-line path in space by a force. If the mass of the object…

A: Given, Object propelled in a straight line. we know,  Force(F) = Mass(M) * Acceleration(A)

Q: A fisherman is fishing from a bridge and is using,a "39.0-N test line." In other words, the line…

A: Given force F =39.0N acceleration a =2.29m/s^2 We have to find weight of the heaviest fish that can…

Q: A fisherman is fishing from a bridge and is using a "30.0-N test line." In other words, the line…

A: (a) When the line is moving at constant speed, the acceleration and hence the net force on the…

Q: A skier with a mass of 60 kg is sliding down a snowy slope, the slope with an angle of 30 degrees…

A:

Q: 1. A 500.0 N student standing on a scale in an elevator notices that the scale reads 550.0 N. a.…

A: When a person stands on a weighing machine, they exert their weight on the machine, and then the…

Q: A person of weight 480 N stands on a scale in an elevator . What will the scale be reading when the…

A: Given, Weight of person W = 480 N Acceleration a = 4 m/s2

Q: A ball with a weight of 8.2 N is thrown at angle of 75 degrees above the horizontal with an initial…

A: Given , the magnitude of the weight of ball is Fg=8.2 NAngle of projection is 75° above…

Q: A 60-kg skydiver is falling at a constant speed near the surface of Earth. The magnitude of the…

A: Given data:  Mass (m) = 60 kg Speed is constant Required: Magnitude of the force due to air friction

Q: A fisherman is fishing from a bridge and is using a "32.0-N test line." In other words, the line…

A: Write a given value of this question. F=32.0N

Q: The weight of a mass on Mercury, where the acceleration due to gravity is 3.61 m/s2, is 1235 N. What…

A: weight  of the mass on mercury  W = 1235 N = m g = m x 3.61 m = 1235/3.61   weight of  the mass on…

Q: happens to the object when you apply a constant force on it in space? A. It will not move B. It will…

A: According to Newton second law  F = ma acceleration is rate of change of velocity.

Q: A person weighs -800 N and is traveling downwards in an elevator whilst stood on a bathroom scale…

A: The given values are, w=-800 N=800 N   downwardsN=840 Nm=81.5 kg

Q: Whenever the net force on a body is zero, its acceleration A) is also zero; B) cannot be equal to…

A:

Q: What will a spring scale read for the weight of a 58.0-kg woman in an elevator that moves (a) upward…

A:

Q: Standing on a weighing scale, a 50-kg person is inside an elevator. What would the scale read if the…

A:

Newton's Second Law

Newton’s laws of motion describe the relationship between the motion of an object and forces acting on it. Newton’s law of motion has two types as follows: