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Pulley Problems with Rotation please help!

  • Thread starter A2Fire
  • Start date
  • #1
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1. Wheel A of radius 10 cm is coupled by belt B to a wheel C of radius 25 cm. Wheel A increases its angular speed from rest at a uniform rate of 1.6 rad/s^2. Determine the ime required for wheel C to reach a rotational speed of 100 rev/min, assuming the belt does not slip



2. I'm very confused by what exactly I have to solve for first. I know that I have to use the 5 equations of motion (with the rotation variables subbed in for the linear ones) but I'm still not sure.



3. I thought that since the radius of C is A*2.5, I thought about solving for A, and then multiplying by 2.5, but I don't know... Can someone please show me how to do it?
 

Answers and Replies

  • #2
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by coupled, it means that the two wheels are connected by a belt that goes around them, like a rubber band.
 
  • #3
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wf^2-wi^2=2a(theta) is what i'm thinking of using, but I don't know where to get (theta) in relation to the radius. i know that theta r = d, but theres no "d"

:(
 

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