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The rotor of a jet engine is rotating at 9,500 revolutions per minute (rpm) when the fuel
is shut off. The ensuing angular acceleration is a = –0.02w, where w is the angular
velocity in radians per second (rad/s). (a) How long does it take the rotor to slow to 900
rpm? (b) How many revolutions does the rotor turn while decelerating to 900 rpm?

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