Question

An inextensible light string is wound over the flywheel and a body is suspended at other end of string. The acceleration of the suspended body when it is released is independent of (ignore friction):

• A. mass of suspended body
• B. mass of wheel
• C. radius of wheel
• D. All

Answer 1

The correct option is C radius of wheel

An inextensible light string is wound over the fly,wheel and a body is suspended at other end of
string. The acceleration of suspended body when it is released is independent of radius as acceleration $=$ g - T/m. Here $Tr=M{r}^2\left(a/r\right)$
=> a(1 + M/m) = g and hence acceleration is independent of radius