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A 36-N force, parallel to the incline, is required to push a certain crate at a velocity of 9.1 up a frictionless incline that is 45° above the horizontal. The mass of the crate is:

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Fap = mg*sin45 = 36 N.
m = 36/g*sin45 = 5.2 kg

Fap = Force applied.

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