11-24-2015, 04:40 AM
Here's one that'll blow yer mind....
As a tire rolls, doesn't it have to stop and start up in the opposite direction when it contacts the street? Else you wouldn't get traction, it would just spin.
This might help...
Here's a little more detail. The car's engine turns the wheels. When
the tire turns at a constant rate, the point at the bottom of the tire
is stationary for a moment; the wheel acts like a lever with the
fulcrum at the bottom, because friction of the tire against the road
keeps it from slipping. The axle, at the center of the wheel, moves
at the speed of the car; the point at the top of the wheel moves twice
as fast.
As a tire rolls, doesn't it have to stop and start up in the opposite direction when it contacts the street? Else you wouldn't get traction, it would just spin.
This might help...
Here's a little more detail. The car's engine turns the wheels. When
the tire turns at a constant rate, the point at the bottom of the tire
is stationary for a moment; the wheel acts like a lever with the
fulcrum at the bottom, because friction of the tire against the road
keeps it from slipping. The axle, at the center of the wheel, moves
at the speed of the car; the point at the top of the wheel moves twice
as fast.