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Draw free body diagram that represents the forces acting on the piano

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Draw free body diagram that represents the forces acting on the piano. A 120 kg piano is at the top of a ramp that makes an angle of 30° with the level ground. As the piano slides down the ramp it experiences a force of friction. The coefficient of kinetic friction is 0.10. 

1.  
2. Determine the magnitude of the normal force acting on the piano.
3. Determine the magnitude of the kinetic force of friction acting on the piano.
4. Determine the acceleration of the piano along the axis parallel to the ramp (i.e. what is the acceleration down the ramp?)