(D)
(E)
3 . You drop a baseball, then after 1.0 s, you drop a second baseball. Assuming air resistance can be
neglected, which of the following statements is correct?
(A) The difference in velocity between the two baseballs decreases as they fall.
(B) The difference in velocity between the two baseballs remains constant as they fall.
(C) The difference in velocity between the two baseballs increases as they fall.
(D) The distance between the baseballs decreases as they fall.
(E) The distance between the baseballs stays constant as they fall.
4 . An object begins at the origin and has a velocity as shown in the figure. When does the object return
to the origin?
(A) 2 s
(B) 3 s
(C) Between 3 and 4 s
(D) 4 s
(E) The object never returns to the origin.
Answers
1 . C —On the way up, the acceleration of the cannonball is . On the way down, the
acceleration is . Therefore, the acceleration on the way up is larger in magnitude