If the hub is not just loose it has probably been in an accident and is bent.
Bad tire? Bad wheel bearing? Bent wheel? Bent axle?
Worn tire? Tire and/or wheel out of balance? Bad wheel bearing? Bent axle?
Swap rear tires from right to left, see if the wobble changes sides. If the wobble changed sides you have a bent rim or a bad tire. If the wobble didn't change sides you have a bent axle or hub.
Check that your tire doesn't have a broken belt or a bulge. Then check your wheel balance. If the tire is okay and it is balanced, check your axle an axle bearings. If it is IRS check all bushes, rubbers, and control arms.
The wheel will wobble, and it may have a axel seal leaking gear oil onto the brakes.
Yes, it is a wheel and axle.
To properly install and adjust a bicycle quick release axle, follow these steps: Insert the axle into the wheel hub, making sure it is fully seated. Place the wheel onto the bike frame, aligning the axle with the dropouts. Tighten the quick release lever until it is snug, but not overly tight. Close the lever and make sure it is securely in place. Test the wheel by trying to wobble it side to side - it should be secure. If the wheel is loose, adjust the tension by turning the nut on the opposite side of the quick release lever. Repeat steps 3-5 until the wheel is securely in place and does not wobble. Remember to always double-check the quick release before riding to ensure the wheel is properly secured.
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.
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.
The mechanical advantage of a wheel and axle is the ratio of the radius of the wheel to the radius of the axle.