1 Fig. 1 shows a block of mass 3 kg on a plane which is inclined at an angle of \(30 ^ { \circ }\) to the horizontal.
A force \(P \mathrm {~N}\) is applied to the block parallel to the plane in the upwards direction.
The plane is rough so that a frictional force of 10 N opposes the motion.
The block is moving at constant speed up the plane.
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\caption{Fig. 1}
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- Mark and label all the forces acting on the block.
- Calculate the magnitude of the normal reaction of the plane on the block.
- Calculate the magnitude of the force \(P\).