The propeller of an airplane is 9 feet in diameter. What is the speed of the tip of a propeller blade if the angular velocity of the propeller is 50 radians per second?

Question

anonymous · Answer

Think circumference/arc length formula.

anonymous · Answer

n/360 (2pi r), yeah. I don't understand how to calculate the speed, though. I guess this is just combining other things I've done separately and it confuses me. 
Sorry. math's not my... strength.

anonymous · Answer

Speed is distance over time. The distance is the arc length, and the 'over time' you get from the angular velocity.

anonymous · Answer

Okay- Thank you.

anonymous · Answer

y.w.

anonymous · Answer

Wow. Okay. With some minor calculatory wizardry, I've come to the conclusion that it's 225 feet per second.

anonymous · Answer

That's what I get too. Good job!

anonymous · Answer

So the formula is: linear velocity = angular velocity × radius.