How is a wheel like a lever ?
The wheel can be likened to a whole series of levers, like spokes, all attached to the rim of the wheel. It will only ACT as a lever if it is a driven wheel, not free wheeling. There will be a load, an effort and a fulcrum. The effort will be applied as torque to the wheel axle. The load is the resistance to the wheel turning. The fulcrum is the axle centre. The load arm is the wheel's radius. The effort arm is the distance part of the torque, to the axle centre.
