Asked by Allen C

A costant force F iss applied to a crate of mass 25kg to move it upwards along a frictionless inclined plane, when it reaches point A, its speed is 12m.s and 10,8 m,s when it reaches point B which is 3,5m futher up the incline.
5,1 give a reason why the normal force does no work on the crate during its mortion up the incline?
5,2use ENERGY PRINCIPLES to calculate the magnitude of the force F?

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