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The normal force, Static and Kinetic Frictional Forces

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A 35-kg crate rests on a horizontal floor, and a 65-kg person is standing on the crate.

Determine the magnitude of the normal force that

(a)the floor exerts on the crate and
(b) the crate exerts on the person.

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a.)
the force exerted by the floor on the crate = weight of (the crate + ...

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