Question: A disk turns through 42 revolutions as it slows from an angular speed of 2 rad/s to stop. i) Assuming a constant angular deceleration, what

A disk turns through 42 revolutions as it slows from an angular speed of 2 rad/s to stop. 

i) Assuming a constant angular deceleration, what is the angular acceleration?

ii) How long does it take to stop?

iii) How much time is required for it to complete 21 of the 42 revolutions?

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