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 - mv2/l, (iii) T + mv2/l, (iv) 0Here T is the tension in the string (choose the correct alternative.)

One end of a string of length l is connected to a particle of mass m a

1.	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 - mv2/l, (iii) T + mv2/l, (iv) 0Here T is the tension in the string (choose the correct alternative.)
Answer» (i) is correct. The particle moving along the circular path is constantly accelerated and hence it must be under the action of an external force. The net force on the particle is T.