A pulley of radius 03 m is rotating counter-clockwise and

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1. A pulley of radius 0.3 m is rotating counter-clockwise and is pulling a weight upward. The weight slows the spinning pulley so that it comes to rest. The angular acceleration is -2.10 R/s^2

a. If the pulley's initial angular speed is 5.4 R/s, how many seconds does it take for the pulley to come to rest?

b. Through what angle in radians does the pulley turn during this time?

c. What was the initial upward speed in m/s of the weight?

2. A car engine is initially rotating at 200 rad/s. It is then turned off and takes 3.0 s to come to a complete stop. Assuming that the acceleration is constant, what is the angular acceleration of the engine in R/s^2

Reference no: EM13632818

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