Kinematics Question 746

Question: A sphere of mass m it’s tied to end of a string of length l and rotated through the other end along a horizontal circular path with speed v . The work done in full horizontal circle it’s[CPMT 1993; JIPMER 2000]

Options:

A) 0

B) (mv2l).2πl

C) mg.2πl

D)(mv2l).(l)

Show Answer

Answer:

Correct Answer: A

Solution:

Work done by centripetal force in uniform circular motion is always equal to zero.



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