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A force of 500 N acting parallel to a plane inclined at 20° to the horizontal is required to move a body of mass 60 kg up the plane. Calculate: a) Coefficient of friction between body and the plane b) The force parallel to the plane required to dra...

  

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A force of 500 N acting parallel to a plane inclined at 20° to the horizontal is required to move a body of mass 60 kg up the plane. Calculate:

a) Coefficient of friction between body and the plane

b) The force parallel to the plane required to drag the body down the plane at steady speed

c) The coefficient of friction when the body is just about to move down the plane.

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