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Question 22.
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In question 22, we are looking at a rotor inside of a centrifuge that is speeding up, and these are the given values.
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So we're given initial angular velocity, final angular velocity, as well as time.
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In part a, we are asked to find what is the displacement that the rotor goes through, and in part b, we are asked for the angular acceleration.
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Here again we're going to need to use our kinematic equations.
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For part a, because i don't yet know my angular acceleration, i'm going to use this equation.
00:47
So to obtain the angle through which the rotor turns, i'm going to substitute the values given to me above.
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I then simplify and solve for the final angle, which in this case is 4 .6 times 10 to the 3 radiance.
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Looking at part b, i'm again going to need a kinematic equation and i observe which pieces of information i have.
01:18
I have initial and final angular velocity...