A mass of 100 g strikes the wall with speed `5 m//s` at an angle as shown in figure and it rebounds with the same speed it the contact time is `2 xx 10^(-3) sec`. What is the force applied on the mass by the wall :

Options

A. `250 sqrt(3)` to right
B. 250 N to right
C. `250 sqrt(3) N` to left
D. 250 N to left

Answer

C

Explanation

`F_(x)=(Delta P_(x))/(Delta t)=((P f_(x)-P i_(x)))/(Delta t)`
`=(-mV sin 60^(@) -(mV sin 60^(2)))/(2 xx10^(-3))=-250 sqrt(3)N`
`= 250 sqrt(3) N` towards left.