Question

A car of mass 500 kg is moving at 24 m/s.a lion of mass 100 kg drops on to the roof of the car from an overhanging branch.show that the car will slow down to 20 m/s

Answer 1

According to the law of conservation of momentum

$mv=(M+m)u\to u=\frac{mv}{M+m}=\frac{500\cdot24}{100+500}=20\ (m/s)$ . Answer