<P> The mechanical advantage of a wheel and axle with no friction is called the ideal mechanical advantage (IMA). It is calculated with the following formula: </P> <Dl> <Dd> I M A = F out F in = R a d i u s wheel R a d i u s axle (\ displaystyle \ mathrm (IMA) = (F_ (\ text (out)) \ over F_ (\ text (in))) = (\ mathrm (Radius) _ (\ text (wheel)) \ over \ mathrm (Radius) _ (\ text (axle)))) </Dd> </Dl> <Dd> I M A = F out F in = R a d i u s wheel R a d i u s axle (\ displaystyle \ mathrm (IMA) = (F_ (\ text (out)) \ over F_ (\ text (in))) = (\ mathrm (Radius) _ (\ text (wheel)) \ over \ mathrm (Radius) _ (\ text (axle)))) </Dd> <P> All actual wheels have friction, which dissipates some of the power as heat . The actual mechanical advantage (AMA) of a wheel and axle is calculated with the following formula: </P>

When turning a wheel that is attached to an axle which of the following happens