AP Physics Unit 2 Progress Check MCQ

AP PHYSICS 1 Scoring Guide


Unit 2 Progress Check: MCQ Part A

Block is placed on a rough surface inclined at an angle above the horizontal. A taut string connects block over a
pulley to block , which hangs from the string, as shown below. The masses of blocks and are and ,
respectively. At time , block is sliding up the slope as block falls, and the blocks are both slowing down.
Assume that the mass and friction of the pulley are negligible.




1. If the mass of block is , the gravitational force exerted on block is most nearly which of the following?
(A)
(B)
(C)
(D) It is impossible to determine without knowing the mass of block .

2. The two blocks eventually stop and reverse direction. Which of the following graphs best predicts the acceleration
of block as it moves up and down the rough, inclined surface? Assume that the positive direction points down the
slope.




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, Scoring Guide


Unit 2 Progress Check: MCQ Part A




(A)




(B)




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Unit 2 Progress Check: MCQ Part A




(C)




(D)




3. A object is released from rest near the surface of a planet such that its gravitational field is considered to be
constant. The mass of the planet is unknown. After , the object has fallen . Air resistance is considered to
be negligible. What is the gravitational force exerted on the object near the planet’s surface?




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