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A centrifuge rotor rotating at 10,300 rpm is shut off and is eventually brought
Chapter 8, Problem 37P(choose chapter or problem)
Problem 37P
A centrifuge rotor rotating at 10,300 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.20 m·N. If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, through how many revolutions will the rotor turn before coming to rest, and how long will it take?
Questions & Answers
QUESTION:
Problem 37P
A centrifuge rotor rotating at 10,300 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.20 m·N. If the mass of the rotor is 4.80 kg and it can be approximated as a solid cylinder of radius 0.0710 m, through how many revolutions will the rotor turn before coming to rest, and how long will it take?
ANSWER:
Solution 37P:
Step 1 of 3:-
Here we need to calculate the number of rotations before coming to rest and the time it will take for it.
The initial frequency was: .
The initial angular velocity can be calculated as,
.
The final angular velocity is: .
We know that,
.