- #1
Marioqwe
- 68
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A crossed belt connects a 20-cm pulley (10-cm radius) on an electric motor with a 40-cm pulley (20-cm radius) on a saw arbor. The electric motor runs at 1700 revolutions per minute.
http://s3.amazonaws.com/answer-board-image/09b77fee-f30b-4564-8c92-48e462481f83.png
(a) Determine the number of revolutions per minute of the saw.
(b) How does crossing the belt affect the saw in relation to the motor?
(c) Let L be the total length of the belt. Write L as a function of ?, where ? is measured in radians.
a) 3400 revs/min
b) it increases the angular velocity of the saw?
c)
I used the formula for circumference and arc length to find the length of the belt around both pulleys, but I don't know how to get the length of the belt that is not around the pulleys in terms of phi.
I don't know if I'm asking for too much but please, don't give the answer, just a hint.
Thank You
http://s3.amazonaws.com/answer-board-image/09b77fee-f30b-4564-8c92-48e462481f83.png
(a) Determine the number of revolutions per minute of the saw.
(b) How does crossing the belt affect the saw in relation to the motor?
(c) Let L be the total length of the belt. Write L as a function of ?, where ? is measured in radians.
Homework Equations
The Attempt at a Solution
a) 3400 revs/min
b) it increases the angular velocity of the saw?
c)
I used the formula for circumference and arc length to find the length of the belt around both pulleys, but I don't know how to get the length of the belt that is not around the pulleys in terms of phi.
I don't know if I'm asking for too much but please, don't give the answer, just a hint.
Thank You