# An object of mass M and Radius R is performing pure rolling. motion on smooth horizontal surface under the action of a constant force F. The object may be

$\begin{array}{1 1} a) disc \\ b) ring \\ c) solid \;cylinder \\ d) hollow\; sphere \end{array}$

$F_{cr}=ring$
$F= Ma_{cm}$--------(1)
$FR= I \alpha$
=> $F= MR \alpha$----------(2)
Only for a ring $acm= R \alpha$ condition will be satisfied
edited Jun 22, 2014