Question

A blue ball travelling at 2m/s hits a red ball at rest on a table. after they collide both balls move in the same direction. Both balls have the same mass. The blue ball continues to move with a reduced velocity of 0.2m/s what is the velocity of the red ball?
answered
momentum before = momentum after
m * 2 + m * 0 = m * .2 + m * v

1.8 = v

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