Question

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 :

(where T is the tension in the string)

• A. T
• B. $\mathrm { T } - \frac { \mathrm { mv } ^ { 2 } } { \mathrm { l } }$
• C. $\mathrm { T } + \frac { \mathrm { mv } ^ { 2 } } { \mathrm { l } }$
• D. 0

Answer 1

Answer: (A)

T

Answer 2

The net force on the particle directed towards the centre is T