12.0-kg block is pushed across a rough horizontal surface by a force that is angled 30.0◦below thehorizontal. The magnitude of the force is 75.0 N and the acceleration of the block as it is pushed is 3.20m/s2. What is the magnitude of the contact force exerted on the block by the surface?
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12.0-kg block is pushed across a rough horizontal surface by a force that is angled 30.0◦below theho...
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