Question

A rod of length l and mass m fixed at one end, it hanging vertically. The other end is now raised so that the rod makes an angle 30
o
with horizontal line. The work done in this process will be:
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Answer 1

Explanation:

work done =cos 30 *l*m

=(√2)/3*l*m

will be the answer

Answer 2

REFER THE ABOVE PICTURE....