JEE Main Physics question
A ball of mass 0.2 kg is thrown vertically upward by applying a force by hand. If the hand moves 0.2 m while applying the force and the ball goes up to 2 m height further, find the magnitude of the force. Consider g = 10 ms⁻².
Answer: (D)
Solution
After leaving the hand, the ball rises a further 2 m under gravity alone, so its speed at release satisfies v² = 2g(2) = 40 m² s⁻². During the 0.2 m hand-contact phase
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