A stone of mass m tied to a string of length $\ell$ is rotating along a circular path with constant

Question

A stone of mass m tied to a string of length $\ell$ is rotating along a circular path with constant speed $v$. The torque on the stone is\

Professor PC Thomas Classes · Answer

B)Torque on the stone $\vec{	au}=\overrightarrow{\mathrm{r}} 	imes \overrightarrow{\mathrm{F}}$\ $=\mathrm{rF} \sin 	heta=\mathrm{rF} \sin 0^{\circ}=0$.\