Question

1. Ball A was released from the cliff of height H; ball B was released from the cliff of height 2H. The ratio of velocity of ball B to ball A just before they hit the ground is: A) 2 B) 2 1/2 C) 1 D) sqrt(2) E) 1/sqrt(2)

2. Object is thrown up with some initial velocity. No air resistance is present. We can conclude that:

a) Acceleration on the way up is greater than acceleration on the way down.

b)Acceleration on the way up is smaller than acceleration on the way down.

c)Acceleration on the way up is exactly equal to acceleration on the way down.

d) Acceleration on the way up is equal in magnitude, but opposite in direction to the acceleration on the way down.

3) Object is thrown upward. At the highest point of trajectory its acceleration is a) 0 b) g down c) g up d) 2g down e) not enough info.

Answer 1

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