- #1
darkAzNk3n
- 8
- 0
Homework Statement
A 28.4-kg solid aluminum cylindrical wheel of radius 0.41m is rotating about its axle in frictionless bearings with angular velocity w = 32.8 rad/s. If the temperature is then raised from 20.0 degrees celcius to 95.0 degrees celcuis, what is the fractional change in angular velocity w?
Homework Equations
delta l = alpha*l*delta T T=temperature
v=rw w=angular frequency
The Attempt at a Solution
I used the thermal expansion equation and found the change in Radius r.
I also assumed that because the wheel was on frictionless bearings that velocity v was constant.
so finding the change in r, i pluged into the angular frequency equation delta w = v/delta r.
is that in any way correct?