A 0.280-kg ball makes an elastic head-on collision with a second ball initially at rest.The second ball moves off with one fourth the original speed of the first ball.What is the velocity of the first ball after the collision,in terms of its initial velocity,v?
A)-0.16v
B)+0.16v
C)-0.25v
D)+0.25v
E)0
F) +0.75v
G) -0.75v

Question

A 0.280-kg ball makes an elastic head-on collision with a second ball initially at rest.The second ball moves off with one fourth the original speed of the first ball.What is the velocity of the first ball after the collision,in terms of its initial velocity,v?
A)-0.16v
B)+0.16v
C)-0.25v
D)+0.25v
E)0
F)  +0.75v 
G)  -0.75v

Quizplus · Accepted Answer

The Answer of A 0.280-kg ball makes an elastic head-on collision with a second ball initially at rest.The second ball moves off with one fourth the original speed of the first ball.What is the velocity of the first ball after the collision,in terms of its initial velocity,v?
A)-0.16v
B)+0.16v
C)-0.25v
D)+0.25v
E)0
F)  +0.75v 
G)  -0.75v

A 0280-Kg Ball Makes an Elastic Head-On Collision with a Second