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Practice Questions



This activity contains 25 questions.

Question 1.
A packing crate slides down an inclined ramp at constant velocity. Thus we can deduce that


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Question 2.
You fall while skiing and one ski (of weight W) loosens and slides down an icy slope (assume no friction), which makes an angle θ with the horizontal. The force that pushes it down along the hill is


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Question 3.

A rope, tied between a motor and a crate, can pull the crate up a hill of ice (assume no friction) at constant velocity. The free-body diagram of the crate should contain


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Question 4.

If two identical masses, attached by a massless cord passing over a massless, frictionless pulley of an Atwood's machine (at different heights), are released


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Question 5.
The same horizontal force is applied to objects of different mass. Which of the following graphs illustrates the experimental results?


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Question 6.

A train consists of a caboose (mass = 1000 kg), a car (mass = 2000 kg), and an engine car (mass = 2000 kg). If the train has an acceleration of 5 m/s2, then the tension force in the coupling between the middle car and the engine car is

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Question 7.
A decoration, of mass M, is suspended by a string from the ceiling inside an elevator. The elevator is traveling upward with a constant speed. The tension in the string is


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Question 8.

Two identical masses are attached by a light string that passes over a small pulley, as shown. The table and the pulley are frictionless. The system is moving


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Question 9.
Two cardboard boxes full of books are in contact with each other on a frictionless table. Box H has twice the mass of box G. If you push on box G with a horizontal force F, then box H will experience a net force of


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Question 10.
A toolbox, of mass M, is resting on a flat board. One end of the board is lifted up until the toolbox just starts to slide. The angle θ that the board makes with the horizontal for this to occur depends on the


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Question 11.

Four students perform an experiment by pulling an object horizontally across a frictionless table. They repeat the experiment on several other objects of different masses, always applying just enough force to produce the same acceleration. They each graph the results, individually. Which student's graph is correct?

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Question 12.
An object is placed on an inclined plane. The angle of incline is gradually increased until the object begins to slide. The angle at which this occurs is θ. What is the coefficient of static friction between the object and the plane?


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Question 13.
A mass on a string attached to a ceiling is pulled to the side and let go. When the string makes an angle θ with the vertical, which of the following is not true?


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Question 14.
A roller coaster car does a loop-the-loop. When it is upside down at the very top, which of the following is true?


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Question 15.
A roller coaster car does a loop-the-loop. When it is right-side up at the very bottom, which of the following is true?


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Question 16.
A 2 kg box sits on a 3 kg box which sits on a 5 kg box. The 5 kg box rests on a table top. What is the normal force exerted on the 5 kg box by the table top?


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Question 17.
A 2 kg box sits on a 3 kg box which sits on a 5 kg box. The 5 kg box rests on a table top. What is the normal force exerted by the 5 kg box on the 3 kg box?


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Question 18.
A 0.5 kg (4.9 N) book rests on your desk. Which of the following answers is not correct?


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Question 19.
A 0.5 kg (4.9 N) book rests on your desk. What is the reaction force to the 4.9 N weight (force) of the book?


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Question 20.
You stand on a bathroom scale in an elevator accelerating upwards and it reads 200 Newtons. Which of the following is true?


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Question 21.
During the investigation of a traffic accident, police find skid marks 90 m long. They determine the coefficient of friction between the car's tires and the roadway to be 0.5 for the prevailing conditions. To find the speed of the car you must


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Question 22.
An object moves left to right (right is positive) with speed decreasing at a constant rate and


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Question 23.
Money is to wealth as


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Question 24.
A car pulls on a rope tied to a tree with a force of 1000 Newtons. Which of the following is not true?


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Question 25.
A 5 kg block and a 10 kg block slide down a frictionless incline and


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