Question

An object of mass 'm' is at point A on a vertical circle of radius R. If it is moved to B along ACB, work done is
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(a) 2piR mg
(b) 2R mg
(c) piR 2mg
(d) mR²/2
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Answer 1

Answer:

diameter has find that

Answer 2

Answer:

2Rmg

Explanation:

As the object is being displaced through the diameter then the displacement is 2R

since the object is of mass m and acceleration due to gravity is g then the weight of the object is mg

so the work done is given by

W.D = F .S

= mg × 2R

= 2 R mg