Question

A body of mass 80kg moving with a velocity of 6m/s hits a stationary body

of mass of 40kg. If the two bodies stick after the impact, calculate their
common velocity.

Answer 1

4 m/s

Step-by-step explanation:

Conservation of momentum , mv

Before collision 80 kg * 6 m/s = 480 kg-m/s

after the collision,

the momentum is the same but the mass is 80+40 kg =120 kg

mv = 480

120 * v = 480

v = 4 m/s