Questions 14–21 refer to a toy car which can move to the right or left along a h
ID: 1648415 • Letter: Q
Question
Questions 14–21 refer to a toy car which can move to the right or left along a horizontal line (the positive part of the distance axis).
Assume that friction is so small that it can be ignored.
A force is applied to the car. Choose the one force graph (A through H) for each statement below which could allow the described motion of the car to continue.
You may use a choice more than once or not at all. If you think that none are correct, answer choice J.
19. The car moves toward the left and is speeding up at a steady rate (constant acceleration).
20. The car moves toward the right, speeds up and then slows down.
21. The car was pushed toward the right then released. Which graph describes the force after the car is released?
Explanation / Answer
(19) The situation mentioned is this question is best described by Graph B, as speeding up at a steady rate is because of constant negative force.
(20) The situation mentioned is this question is best described by Graph G, as the positive force, in the beginning, speeds up the car and as time progresses the negative force slows it down.
(21) Graph E describes the situation best.
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