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A 317 kg piano is at the top of a ramp that makes an angle of 18 with the level ground. As the piano slides

A 317 kg piano is at the top of a ramp that makes an angle of 18 with the level ground. As the piano slides down the ramp, it experiences a force of friction. The coefficient of kinetic friction is 0.225. What is the acceleration of the piano down the ramp?

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