4.4 One end of a string of length is connected to a particle of mass and the other to…

PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion

Problem

4.4 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 : (i)

T

, (ii)

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

, (iii)

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

, (iv) 0

T

is the tension in the string. [Choose the correct alternative]. (i)

T

(ii)

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

(iii)

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

(iv) 0