One end of string of length l is connected to a particle of mass 'm' and other end is c

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3-2.Motion in Plane

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One end of string of length $l$ is connected to a particle of mass $'m'$ and the other end is connected to a small peg on a smooth horizontal table. If the particle moves in circle with speed $'v',$ the net force on the particle (directed towards centre) will be ($T$ represents the tension in the string)

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

B$0$

C$\;T\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\;$

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

(NEET-2017)

Solution

Centripetal force $\frac{mv^2}{l}$ is provided by tension so net force on the particle will be equal to tension $T$

Standard 11

Physics

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