Question
Question: A body of mass m is hauled up the hill with constant speed v by a force such that the force at each ...
A body of mass m is hauled up the hill with constant speed v by a force such that the force at each point is directed along the tangent to the path. The length of base of hill is L and its height is h. The coefficient of friction between the body and path is µ. Then which of the following statement is incorrect when body moves from bottom to top –
A
Work done by gravity is –mgh
B
Work done by friction is – µmgL
C
Work done by gravity is path independent
D
None of the above
Answer
Work done by friction is – µmgL
Explanation
Solution
Conceptual