Question

A wheel is rotating at 4 radians/sec, and the wheel has a 91-inch diameter. How do I find linear velocity of a point on the rim?

Answer 1

There are 2pi radians in a circle so the wheel is covering 4/2pi of a circle per second.
Apply that ratio to the calculated circumference to get inches per second

Answer 2

I don't have to convert 2pi into a number to match 4? because 4 is less than 2pi correct?

Answer 3

Right, the wheel is not completing a full revolution in 1 second.
You can convert to a number at the end of the calculations.

Answer 4

ok I see now, thank you.

Answer 5

ur welcome.