Question

A ball of mass 0.05 kg strikes a smooth wall normally four times in 2 seconds with a velocity of 10 m/s. Each time the ball rebounds with the same speed of 10 m/s. Calculate the average force on the wall.

Answer 1

In a nuclear collision, an alpha particle A of mass 4 unit is incident with velocity v on a stationary helium nucleus B of 4 mass unit. After collision, A moves in the direction BC with velocity v/2, where BC makes angle 600 with initial direction AB and the helium nucleus moves along BD. Calculate the velocity of rebound of the helium nucleus along BD and angle made with the direction AB.