One end of a string of length / 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 centre) is _______.
A. T
B. T – \(\frac{m v^{2}}{r}\)
C. T + \(\frac{m v^{2}}{r}\)
D. 0
Answer:A
One end of a string of length / 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 centre) is _______.
A. T B. T – \(\frac{m v^{2}}{r}\) C. T + \(\frac{m v^{2}}{r}\) D. 0