A ball of mass 0.2 kg is ... -Eduinfy.com
MCQ Solution: Laws of Motion

A ball of mass 0.2 kg is thrown vertically upwards by applying a force by hand. If the hand moves 0.2 m which applying the force and the ball goes upto 2 m height further, find the magnitude of the force. Consider g = 10 m/s2

1) 22 N
2) 4 N
3) 16 N
4) 20 N

Solution
Work done by hand = Potential energy of the ball

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