Head-on collision with balls at rest after · CAP 2013 #8
Physics · mechanics
Problem
Two balls of different masses collide head-on. After the collision, the balls remain at rest, and no external forces act on them. Which statement is true about the speeds of the balls before the collision?
a) They must have been different, and the collision was inelastic.
b) They must have been different, and the collision was elastic.
c) They must have been identical, and the collision was inelastic.
d) They must have been identical, and the collision was elastic.
e) No combination of speed values could have caused both balls to stop after the collision.