Recent content by darkAzNk3n

for the fractional change of w, I got something small like 3.74 * 10^-3 rad/sec. is that right?

o Thanks for the help haha one down.. four to go.

hmm since we know L=Iw and since I=Mr^2/2, L = (wMr^2)/2=constant and from thermal expansion equation, we know delta r = alpha*r0*delta T we can then add r0 and delta r to find the new r then we plug back into L = (wMr^2)/2 and from the conservation of angular momentum we know...

I got I = 1/2 mr^2 then L = 1/2 mwr^2 but what bout the L? do i find the change in radius with the thermal expansion equation then plug that radius back into the angular momentum equation?

Conservation of Angular Momentum? dL/dt=0 and L = Iw = constant I think.

Conservation of energy and momentum pop up at the top of my head

the only thing i can come up with is that the radius is constant but, wouldn't the wheel have to expand which would increase the radius for there to be a change in the angular velocity?

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 celsius to 95.0 degrees celcuis, what is the fractional change in angular...