Question: A 12.0-kg block is pushed across a rough horizontal surface by a force that is angled 30.0 below the horizontal. The magnitude of the force

A 12.0-kg block is pushed across a rough horizontal surface by a force that is angled 30.0 below the horizontal. The magnitude of the force is 75.0 N and the acceleration of the block as it is pushed is 3.20 m/s2. What are the magnitudes of the normal force and friction exerted on the block by the surface

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