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 center) is:
where, T = tension on the string.
1. \(T\)
2. \(T-\frac{mv^2}{l}\)
3. \(T+\frac{mv^2}{l}\)
4. zero