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2. A person of mass 80-kg jumps off the floor with an average initial acceleration of 2.5 m/s(acceleration of the person starting from zero velocity

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2. A person of mass 80-kg jumps off the floor with an average initial acceleration of 2.5 m/s(acceleration of the person starting from zero velocity at the floor to until he looses contact with the floor). What is the normal force (N) exerted on him from the floor as he jumps off the floor

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