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