A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes upto 2 m height further, find the magnitude of the force. (Consider `g=10m//s^2`).

Options

A. 4N
B. 16 N
C. 20 N
D. 22 N

Answer

B

Explanation

At height work done on the ball by hand is stored in the form potential energy .
mgh = F.S
`0.2 xx 10 xx 2x = F xx0.2 `
F = 20 N