A spindle connects two wheels with fixed axles by a fan belt. If the effort wheel is larger than the resistance wheel, which axle will turn faster?

A. the effort axle

B. the resistance axle

C. Both axles turn at the same rate.

D. The wheel size does not affect the axle-turning rate.

Power = Iω (constant) as they are connected together, since effort axle has large radius than resistance axle, so moment of inertia of effort axle is also more as compared to resistance axle, so angular speed of effort axle is less than the resistance axle. So answer is B. resistance axle will have more angular speed as its moment of inertia is less for the same power.