A .25 kg pool ball is moving at 5.0m/s E towards a second identical ball at rest. After the collision, the first ball is seen moving at 1.0 m/s E. what is the final velocity of the second ball?

Answer 1

initial momentum=final momentum
.25*5+0=.25*1+.25V
solve for V

Answer 2

M1 = 0.25kg, V1 = 5.0 m/sw.
M2 = 0.25kg, V2 = 0.
V3 = 1.0 m/s = Velocity of M1 after the
collision.
V4 = ?.

Momentum before = Momentum after
M1*V1 + M2*V2 = M1*V3 + M2^V4.
0.25*5 + 0.25*0 = 0.25*1.0 * 0.25^V4,
V4 = ?

Answer 3

4.0 m/s E