Question

An object of mass 2 kg travelling in a straight line with a velocity of 25 m/s collides with, and sticks to a stationary wodden block of mass 10 kg then they both move together in the same straight line. Calculate the velocity of the combined object.

Answer 1

applying conservation of linear momentum
MV1+mv2=(M+m)v

2×25 + 10×0 = (25+10)v

50+0 =35v

v=50/35

v=1.43 m/s