A ball falls to the ground from height h and bounces to height ...

[jparksx]

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

[14vl19]

Answer to Question 1

A

Answer to Question 2

B

[jparksx]

TYSM

[xthemafja]

Gracias!