Question

A ball of mass 0.20 kg Falls freely from a certain height and rebounds elastically with a speed of 40 metre per second the change in momentum of the ball is​

Answer 1

Answer:

since collision is elastic there is no loss of energy, therefore is no loss of energy

on striking change in momentum =40-(-40)=80 kg m/s

Explanation:

Answer 2

Answer:

8 kg m/s

Explanation:

mass=0.20 kg

velocity= 40m/s

momentum= mass×velocity

p=0.20 ×40

p=8 kg m/s