A `100g` iron ball having velocity `10m//s` collides with a wall at an angle `30^(@)` and rebounds with the same angle. If the period of contact between the ball and wall and wall is `0.1` second, then the force experienced by the wall is

Options

A. 10N
B. 100N
C. 1.0 N
D. 0.1 N

Answer

A

Explanation

`F = ("Change in momentum")/("Time")`
` = (2 mv cos 60^(@))/(0.1)`
` = ( 2 xx 0.1 xx 10 xx (1)/(2))/(0.1) = 10N`