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. `1.0N`
D. `0.1N`

Answer

A

Explanation

During collision of ball with the wall horizontal momentum changes `("vertical momentum constant")` F `("Chang e i n horizontal momentum")/("Time of contact")` .
`=(2Pcostheta)/(0.1)=(2mvcostheta)/(0.1)` .
`=(2xx0.1xx10xxcos60^(@))/(0.1)=10N` .