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 t

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)

Smart Achievers · Accepted Answer

(1)

The net force on the particle directed towards the centre is $m$ .

Solution

Q.
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)

1 $T$

2 $T - \frac{m v^{2}}{l}$

3 $T + \frac{m v^{2}}{l}$

4 $0$

Ans.
(1)

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

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Solution

Q. 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)

1 T

2 T-mv2l

3 T+mv2l

4 0

Ans. (1) The net force on the particle directed towards the centre is T.