A body of mass M was slowly hauled up a rough hill by a force F which at each point was directed along a tangent to the hill. Work done by the force
a)Is independent of the shape of trajectory
b)Depends upon the vertical components of displacement but is
independent of horizontal components
c)Depends upon both the components
d)Does not depend upon the coefficient of fiction.
Answers
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0
Answer:
OPTION A AND B ARE CORRECT
Explanation:
If the body slips over rough surface such that normal reaction of the surface had to balance only the normal components of weigh of the body, then the energy lost against friction depends only upon the horizontal component of displacement and is equal to umgx. It does not depend upon the shape of the surface.
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Answered by
3
Answer:
★ Let vector F makes an angle θ with the horizontal at any instant of time .
★ Network's second law in projection from along the direction of the force gives .
Correct Options are :
[ a] Is independent of the shape of trajectory
[ b] Depends upon the vertical components of displacement but is
independent of horizontal components
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