# Physic

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?

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1. t = 55rev * (1/26)s/rev 2.1s.

a = (Vf - Vo) / t = (0 - 26) / 2.1 =
-12.4m/s^2.

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posted by Henry

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