Question

A light particle moving horizontally with speed 8 m/s hits a very heavy block moving in the same direction with speed 4 m/s, after collision, the speed of particle is 2 m/s along the same direction, then the collision is

• A. elastic
• B. oblique inelastic
• C. inelastic
• D. perfectly inelastic

Answer 1

The correct option is C inelastic

$\text{e}=\frac{\text{speed of separation}}{\text{speed of approach}}=\frac{2}{4}=0.5$
e < 1 , collision is inelastic & headon