Originally Posted by
Beamr
How come the top of the wheel moves onwards faster than the axle? To put it other way round, does the bottom of the wheel move forwards slower than 100 knots?
Yes it does. It moves forward at precisely 0 knots. Otherwise it would be skidding. In fact my previous statement about the top NOT going 200kt is actually wrong. Assuming the wheel is perfectly circular, and the axle is dead center, then yes, we have a 1:1 lever so the top IS actually going forward at 200. My apologies.