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because the wheel turns through a much greater distance than the axle.
but the smaller turn of the axle is more powerful.witten by-brenda v.

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Answer #2:

-- The fact that the wheel turns through a greater distance that the axle does
is a result, not a cause, of the wheel being bigger than the axle.

-- The axle is not more powerful than the wheel. Ignoring losses, they must both
have the same power. The axle's force is greater than the wheel's force, but to pay
for it, the axle must turn through greater distance. Same as all the lever stuff.

-- The diameter of the wheel needs to be greater than the diameter of the axle
only if you'd prefer not to have the axle scrape on the ground.

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