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Bearbull24.5
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Homework Statement
A motor keep a Ferris wheel (with moment of inertia 6.22 × 107 kg · m2) rotating at 14 rev/hr. When the motor is turned off, the wheel slows down (because of friction) to 9.3 rev/hr in 28 s.
What was the power of the motor that kept
the wheel rotating at 14 rev/hr despite fric-
tion?
Answer in units of W.
Homework Equations
W=(1/2)Iw(f)^2-(1/2)w(i)^2
P=Tau*w
w= angular momentum
The Attempt at a Solution
I really want to use the first equation to solve for work but I am unsure if I can use the angular momentum values that are given or if I need to convert them