Author Question: A ball falls to the ground from height h and bounces to height h'. Momentum is conserved in the ... (Read 250 times)

jparksx · **on:** Jul 28, 2018

A ball falls to the ground from height h and bounces to height h'. Momentum is conserved in the ball-earth system
a. no matter what height h' it reaches.
b. only if h' < h.
c. only if h' = h.
d. only if h' > h.
e. only if h' h.

Question 2

A 12-g bullet moving horizontally strikes and remains in a 3.0-kg block initially at rest on the edge of a table. The block, which is initially 80 cm above the floor, strikes the floor a horizontal distance of 120 cm from its initial position. What was the initial speed of the bullet?
a. 0.68 km/s
b. 0.75 km/s
c. 0.81 km/s
d. 0.87 km/s
e. 0.41 km/s