Only one back wheel spins

i think you should put some oil on it and while you put the oil an it turn it as well ok

I think your tablet's lcd screen is damaged.
take your tablet to an expert for replacing the lcd screen.

Worn wheel bearing, jack up front to allow wheel to spin. Hold wheel and try to rocck it top to bottom and left to right. get someone under car to look at any play at suspension ball joints or bewaring.

If the vibration started after you had the tires replaced, I'm gong to say its a tire problem.
Spin balancing machines turn the tire and wheel at about 30mph and the high spot is marked for weights. If the tire is not made well, a vibration at a higher speed may not show up on the machine.
I would take the car back and have the tires re-balanced again at no cost.
Take the service manager for a ride before the job is redone to verify the vibration.

sounds like the gear head on the motor might be slipping

Take the rear wheel off the ground (you could flip the bike upside-down to do this) and try to spin the pedals with your hand. Try spinning it backwards and forwards while you adjust the gears. ...If you adjust the gears while the chain is not spinning, the chain could get jammed. This could be your problem.
If that's not it, then try grabbing the wheel itself to see if you can spin it with your hand. If you cannot, then it might just be hitting the bicycle frame or the brake pads. See if you can find the spot where that is happening. If you can, then try to adjust the wheel in the frame by loosening the nuts or the quick-release lever (just push it away from the frame) that holds the wheel on to the bicycle frame... then wiggle the wheel around just a little to see if you can align it so that it is no longer hitting anything. Be sure to either tighten the nuts or push the quick-release lever back towards the frame when you are done. (Don't wiggle it too much unless you want the wheel to come out of the frame!)
If neither of these things work, you probably need to take it in to a bike shop. Most shops will give you a free estimate- they should tell you what is wrong, as well as how much it would cost to fix it.

try contacting the company. if the car wheels are broke or dangeling you would need new wheels. if the wheels arent the problem it could b the turning starvos

I recently needed to repair my washer. With limited money I sure couldn't buy a new one so I did some looking and found this site, I have included info on your dryers model number. I hope this helps, These folks were fast and my son was able to do the work without any special tools - http://www.repairclinic.com/Shop-For-Parts?s=t-MDE5500AY-%3d%3d

Noise. Drive at walking-pace along a quiet street, & listen at each side-window in turn. One side will always fail before the other, giving a rumbling sound on one side. Are yr wheel-nuts tight, front & rear? Jack up the front of the car. Spin each wheel. There should be no noise or roughness, apart from maybe a slight shh noise from the brake. Hold the road-wheel at top & bottom & try to shake it. Movement could be wheel -bearing or suspension wear. Look at or put your thumb against the various joints while an assistant rocks the wheel. Don't get under a car unless it's rock-solid.

If you have a good ear and feel for it, you can raise the wheel and spin it and listen for a slight grinding noise or you might be able to feel roughness when the tire spins.

Otherwise, the bearing(s) will need to come out and be inspected for pits.

I doubt you'll have to replace the hub. The bearing and race usually take the beating, protecting the hub.

But, to answer your question, the hub usually comes off easily after removing the axle nut. On SOME vehicles this is not very easy, and a repair manual would be the best way to get this procedure if you need it.