Question

A 2kg mass moving at 8m/s collide with another mass of 1kg iñ opposite direction. If the 2kg mass moves at 0.5m/s after collision what is the velocity of the 1kg mass

Answer 1

here m1
$= 2kg \\ m2 = 1kg \\ v1 = 0.5m \: per \: sec \\ since \: m1v1 = m2v2 \\ so \: 2 \times 0.5 = 1 \times v2 \\ v2 = 1m \: per \: sec$