another trigonometry word problem

**08gakawa** · February 12th 2008, 09:14 PM

Electric Motor. if a 2 inch diameter pulley that's being driven by an electric motor and running at 1600 revolutions per minute is connected by a belt to a 5 inch diameter pulley to drive a saw, what is the speed of the saw in revolutions per minute?

**earboth** · February 12th 2008, 11:19 PM

Originally Posted by 08gakawa

Electric Motor. if a 2 inch diameter pulley that's being driven by an electric motor and running at 1600 revolutions per minute is connected by a belt to a 5 inch diameter pulley to drive a saw, what is the speed of the saw in revolutions per minute?

Use the same method as angel.white has described here http://www.mathhelpforum.com/math-he...306-post2.html

The product of revolutions times circumferences must be constant:

$r_1 \cdot c_1 = r_2 \cdot c_2$ . Plug in the values you know:

$1600 \cdot 2\pi = r_2 \cdot 5\pi$ . Solve for $r_2$ .

(For confirmation only: $r_2 = 640$ )

Thread: another trigonometry word problem

LinkBack

Thread Tools

Display

another trigonometry word problem

Similar Math Help Forum Discussions

Trigonometry word problem

Trigonometry word problem

Trigonometry Word Problem

trigonometry word problem

Trigonometry word problem

Search Tags