The knob is the 'wheel' and the rod that goes through lock is the 'axle'
There should be a lock ring on the axle that prevents the wheel from sliding off while in service. Remove the lock ring and slide the wheel off the axle. You may need a lock rings pliers to remove it, or you might be able to do it with a small screw driver.
It is on top of the rear axle.
Yes, it is a wheel and axle.
The IMA of a wheel and axle is the radius of wheel divided by the radius of the axle.
The wheel generally turns the axle.
A pulley is a wheel but not an axle.
The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel to the radius of the axle.
A pulley is a type of wheel that rotates on an axle. Both pulleys and wheel-and-axle systems involve circular motion to help move and lift objects. In a wheel and axle, the wheel is a type of axle, while in a pulley system, the wheel and the axle are separate components.
There is no specific answer to a wheel and axle. A wheel and axle is actually defined as a lever that spins. Generally, the wheel rotates around the axle for the proper usage of certain machines.
A Ferris wheel is a type of simple machine known as a wheel and axle. The wheel is the circular part of the Ferris wheel that rotates, and the axle is the central rod that the wheel spins around.
When the wheel is turned, so is the axle and vice versa.