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# Physics: Coefficient of friction, Coefficient of kinetic friction

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1. A 400lb body is pulled up an inclined plane 15 ft long and 5 ft high. The force to pull the body up the plan at constant speed is 200lb. Compute ideal mechanical advantage (IMA = 15/5 =3) actual mechanical advantage (AMA = P/F = (400/2.2 x 9.8)/200/2.2 x9.8) = 2). What is the coefficient of friction between the body and the plane?

2. Calculate the work done drawing a mass of 20kg at uniform speed up a plane 2 m long that makes an angle of 30 degrees with the horizontal if coefficient of kinetic friction is 0.2

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#### Solution Summary

The expert examines coefficient of friction and coefficient of kinetic frictions. The work done by drawing a mass is calculated.

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