Question

A brick after falling from a hill collide with ground with a momentum
of 100 kg m/s. If the mass of the brick is 5 kg what was its velocity while 
colliding with the ground?

Answer 1

Momentum = 100kg m/s

Mass of the brick = 5kg

Momentum = mass × velocity

100kg m/s = 5kg × velocity

(100/5)m/s = velocity

Therefore, the velocity = 20m/s

Hope you understood!