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A man lifts a 1.0 kg stone vertically with his hand at a constant upward acceleration of 1.8m/2^2. what is the magnitude of the total force of the stone on the man's hand?
In Newtons downward?

  • Physics -

    The man's hand pushes the stone upward with force F = m a + m g (since F - Mg is the net force)

    The stone pushes the man's hand downward with the same force. (Because of Newton's third law)

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