A helicopter has just landed and as its engine is turned


A helicopter has just landed and as it's engine is turned off, the angular velocity of the rotor blades decreases uniformly from 500 rev/mm to 100 rev/mm in 12.0- s interval.

a) What is the angular acceleration (in rev/s2)?

b) Through how many revolutions does the rotor turn in 12.0-s interval?

c) How long does it take for the rotor to stop?

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Physics: A helicopter has just landed and as its engine is turned
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