A body of mass 5kg rests on a smooth plane inclined at angle 30° to the horizontal. What are the magnitude of the force p applied along the plane which keeps it from sliding down and the normal reaction between the plane and the body?
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Answer:
The force acting on the object due to gravity for sliding down is mgsinθ which is equal to 25 N here.
now, the component of the horizontal force F
a
along the incline plane should be equal to 25 N. For that,
F
a
cos30°=25
F
a
=
3
50
N
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