Hi,
I presume you are talking about the chapter of circular motion
in A level physics, or something similar to this.
In circular motion, ω is the radians per second, or rather, a
measure of the rpm in terms of radians. We also have tangential
velocity, where v = rω.
Using the formula v = rω, we can see that the further you are
from the radius or rotation, the faster your tangential speed.
You cannot really say which wheel size has a higher speed,
because the speed depends on the distance from the centre of the
wheel. You could only probably give a question on which wheel has a
faster tangential velocity, which in this case, is the wheel with a
larger radius.
So unlike gears which either give speed or power, larger wheels
give both speed and power?
