physics
posted by gregory .
A Ferris wheel rotates at an angular velocity of 0.28 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.021 rad/s2. How long does it take the wheel to come up to operating speed?

physics 
MathMate
ω2=ω1)+angular acceleration*time
or
time = (ω2ω1)/angular acceleration
=(0.280)/0.021
=40/3 sec.
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