Question #81305
A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to________________?
Options:
Explanation:
- The screw is considered as an inclined plane with inclination α.
- When a load is being raised, the following force acts on it at a point on the inclined plane.
- Load (W): It always acts in a vertically downward direction, Normal Reaction (N): It acts perpendicular to the inclined plane.
- Frictional force (μN): Frictional force acts opposite to the motion. Since the load is moving up the inclined plane, the frictional force acts along the inclined plane in the downward direction.
- Effort (P): Effort P acts perpendicular to the load W. It acts towards right for lifting the load and towards left for lowering the load.
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