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Q2. A body can be hauled up an inclined plane at constant velocity by a 2.5 kN force applied parallel to the plane. The same body can be lowered with constant velocity by a force of 150 N applied parallel to the plane.

If the plane rises 1 m in height for every 5 m of length:

(a) sketch the force diagram for the body being hauled up the inclined plane. (4)

(b) calculate the mass of the body. (8)

(c) calculate the coefficient of friction between the contact surfaces. (4)