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A 4.210 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is My =

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A 4.210 kg block of wood rests on a steel desk. The coefficient of static friction between the block and the desk is My = 0.605 and the coefficient of F kinetic friction is MK = 0.155. At time t = 0, a force F = 15.4 N is applied m horizontally to the block. State the force of friction applied to the block by Us, K the table at times t = 0 and t > 0. 1 = 0 N 1> 0 N Consider the same situation, but this time the external force F is 31.0 N. Again, state the force of friction acting on the block at times t = 0 and t > 0. 1 = 0 N 1 > 0 N

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