A 340-g air track cart traveling at 1.25 m/s suddenly collides elastically with a stationary 300-g cart. What is the speed of the 300-g cart just after the collision?
A) 0.625 m/s
B) 0.0781 m/s
C) 1.25 m/s
D) 0.664 m/s
E) 1.33 m/s

Question

A 340-g air track cart traveling at  1.25 m/s suddenly collides elastically with a stationary  300-g  cart. What is the speed of the  300-g cart just after the collision?
A)  0.625 m/s
B)  0.0781 m/s
C)  1.25 m/s
D)  0.664 m/s
E)  1.33 m/s

Quizplus · Accepted Answer

In an elastic collision, momentum and kinetic energy are conserved. Using the conservation of momentum and solving for the velocity of the 300-g cart, we find it to be 1.33 m/s.

A 340-G Air Track Cart Traveling at 1