Glider A,traveling at 10 m/s on an air track,collides elastically with glider B traveling at 8.0 m/s in the same direction.The gliders are of equal mass.The final speed of glider B is
A)8.4 m/s
B)10 m/s
C)8.0 m/s
D)4.0 m/s
E)12 m/s

Question

Quizplus · Accepted Answer

In an elastic collision between two objects of equal mass where one object is moving and the other is stationary or moving in the same direction, the two objects simply exchange their velocities. Since glider A is moving faster than glider B and they collide elastically, glider B will end up with glider A's initial velocity of 10 m/s.

Glider A,traveling at 10 M/s on an Air Track,collides Elastically