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 :
`(i) T, (ii) T - (mv^2)/(l) , (iii) T + (mv^2)/(l) , (iv) 0`
T is the tension in the string. [Choose the correct alternative].

Explanation

(i) T
For particle moving on circular path with constant velocity tension (T ) provide necessary centripetal force.