A light, non-stretching string is wrapped around a small pulley of radius . The…

PHYSICS · Single correct · CBSE · Physics · System of Particles and Rotational Motion · System of Particles and Rotational Motion

Problem

A light, non-stretching string is wrapped around a small pulley of radius

R

. The string is pulled so that the pulley undergoes an angular acceleration

\alpha

. Which of the following gives the magnitude of the linear acceleration

a

of a point on the rim during this interval? (a)

a = \dfrac{1}{2}\,\alpha R

(b)

a = \sqrt{2}\,\alpha R

(c)

a = \alpha R

(d)

a = 2\,\alpha R