A wheel of radius 1.9 feet is moving forward at 18fps. How fast is the wheel rotating?

What equation(s) do I use to solve this problem?

Question

A wheel of radius 1.9 feet is moving forward at 18fps. How fast is the wheel rotating?

What equation(s) do I use to solve this problem?

ragingsquirrel · Answer

Radius is half the diameter. 1.9 times 2 is 3.8. 18 times 2 is 36. I believe your answer is 36.

dumbcow · Answer

you need the formula for circumference of a circle
C = 2*pi*r,
that is the distance it travels in 1 revolution
to get revolutions per second, multiply speed(fps) by 1/C

--> rps = speed/C

anonymous · Answer

The answer needs to be in radians/sec

dumbcow · Answer

well there are 2pi radians in 1 revolution
multiply by 2pi

--> radians/sec = speed/r