Question

A 100g ball having speed 10 m/s collides with a wall and rebound with the same speed and the contact period between the ball and wall is 0.1sec,then the force experience by the wall is

Answer 1

The answer is 100 root3 and it is easy to understand the derivation of the root3. It is reflecting through the wall and at same angle.

This denotes wall velocity and offers 1m/s at an angle of 30 degrees with the wall.

The velocity of the ball takes along X axis and strikes a wall with a speed with force applied by the wall.

Answer 2

$\huge \sf100 \sqrt{3}$