Physic
posted by Maria .
A flywheel rotates with an angular speed of 26 rev/s. As it is brought to rest with a constant acceleration, it turns 55 rev.
What is the magnitude of the angular acceleration?
How much time does it take to stop?

t = 55rev * (1/26)s/rev 2.1s.
a = (Vf  Vo) / t = (0  26) / 2.1 =
12.4m/s^2.
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