NEET | 2017Laws of MotionHard

Question

One end of string of length l is connected to a particle of mass 'm' and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed 'v' the net force on the particle (directed towards centre) will be (T represents the tension in the string) :-

Options

A.

T+mv21

B.

T-mv21

C.

Zero

D.

T

Solution

Net force on the particle in uniform circular motion is centripetal force, which is provided by the tension in string.

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