A body of mass 2kg collides with a wall with speed 100 m/s and rebounds with same speed. If the time of contact was 1/50 second, the force exerted on the wall is

Options

A. `10^(4) N`
B. 4N
C. ` 2 xx 10^(4)N`
D. 8N

Answer

C

Explanation

` Deltap=Fdeltat`
Here ` Deltap=2xx(2xx100)=400 ms^(-1) `
`:. F=(400)/(1//5)=2 xx 10^(4)N`