I know that a motor, through transmission, make wheels turn. But.. How do wheels “drive” a whole car (or anything with wheels and a motor) ? Where do the force apply to make this ton of steel move?
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The actual force transmission is mostly occurring through the wheel bearings where the rotating axle contacts the stationary frame of the car. They bear the friction and the load, hence the name.
The equal and opposite reaction force is transmitted to the ground through tires – the earth spins ever so slightly in the other direction.
The motor creates a torque in the axle that the wheel and tire are attached to. The tire tries to turn. There is friction between the tire and the road that prevents the tire from slipping in place. So, when the tire pushes backwards on the road, the road pushes forward on the tire just as hard. The entire vehicle then moves forward.
The twisting force (torque) on the wheels apply a force to the road through the tyres. This force tries to push the road backwards, but since it’s stuck to the Earth while the car is free to roll, it moves the car forwards instead.
The actual force transmission is mostly occurring through the wheel bearings where the rotating axle contacts the stationary frame of the car. They bear the friction and the load, hence the name.
The equal and opposite reaction force is transmitted to the ground through tires – the earth spins ever so slightly in the other direction.
The motor creates a torque in the axle that the wheel and tire are attached to. The tire tries to turn. There is friction between the tire and the road that prevents the tire from slipping in place. So, when the tire pushes backwards on the road, the road pushes forward on the tire just as hard. The entire vehicle then moves forward.
The twisting force (torque) on the wheels apply a force to the road through the tyres. This force tries to push the road backwards, but since it’s stuck to the Earth while the car is free to roll, it moves the car forwards instead.
The wheel turns, which pulls on the tire that pulls on the road surface. For an extreme example see deforming tires when a drag racing car takes off: https://imgur.com/wpkPlwM
The wheel turns, which pulls on the tire that pulls on the road surface. For an extreme example see deforming tires when a drag racing car takes off: https://imgur.com/wpkPlwM
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