An effort of (1 mathrm{kN}) is required to move a certain body up an inclined plane of
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An effort of \(1 \mathrm{kN}\) is required to move a certain body up an inclined plane of angle \(15^{\circ}\) when the force is acting parallel to the plane. If the angle of plane is increased to \(20^{\circ}\), then the effort required is \(1.25 \mathrm{kN}\). Find the weight of the body and coefficient of friction.
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