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# Word problem help please ?

an airplane propeller blade is 2.80ft long and rotates at 2210 revolutions per min. find the linear velocity of a point on the tip of the blade in ft/sec

### 2 Answers

- ?Lv 72 months agoFavorite Answer
(2210 rev/min)(1 min/60 s)(2pi rad/rev)(2.80 ft/rad)

= (2210*2pi*2.80 / 60) ft/s

= about 6000 ft/s but use a calculator.

- ?Lv 72 months ago
Hint: What is the circumference of the path of the tip of the propeller?

It does this 2210 times in 60 seconds.

Conclusion?

Done!

Hopefully no one will spoil you the answer. That would be very irresponsible of them.