Q. 43.9( 48 Votes )

One end of a string of length l is connected to a particle of mass m and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed v the net force on the particle (directed towards the centre) is:

T is the tension in the string. [Choose the correct alternative].
A .  T,
B. 

C.

D. 0

Answer :

The centripetal force experienced by a particle connected to a string revolving in a circular path around a centre is given by,


Where,


F is the centripetal force acting on the particle


m is the mass of the particle.


v is the speed of the particle and


l is the length of the string.


Here, the tension produces in the spring provides the centripetal force required by the body to stay in a circular motion.


Thus, the net force on the particle is given as,



Where,


T is the tension in the string.


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