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 = 10 m//s^(2)`:

Options

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

Answer

c

Explanation

Work done by force = increases in P.E. of ball
`:. Fxx0.2=mgh`
`F=(0.2xx10xx2)/(0.2)=20 N`