# ass4 - Practice Problems 4 1 In the diagram shown below the...

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1. In the diagram shown below, the lower block is acted on by a force, F, which has a magnitude of 55.2 N. The coefficient of kinetic friction between the lower block and the surface is 0.363. The coefficient of kinetic friction between the lower block and the upper block is also 0.363. What is the acceleration of the lower block, if the mass of the lower block is 3.19 kg and the mass of the upper block is 1.45 kg? Answer: 6.11e+00 m/s^2 2 . A block of mass M resting on a 19.0° slope is shown. The block has coefficients of friction μ s =0.703 and μ k =0.386 with the surface. It is connected via a massless string over a massless, frictionless pulley to a hanging block of mass 2.44 kg. What is the minimum mass M1 that will stick and not slip? Answer: 2.46e+00 kg 3 . If this minimum mass is nudged ever so slightly, it will start being pulled up the incline. What acceleration will it have? Answer:

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ass4 - Practice Problems 4 1 In the diagram shown below the...

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