(II) A centrifuge rotor rotating at 9200 rpm is shut off andis eventually brought uniformly to rest by a frictionaltorque of 1.20 m N If the mass of the rotor is 3.10 kg andit can be approximated as a solid cylinder of radius0.0710 m, through how many revolutions will the rotorturn before coming to rest, and how long will it take?
Rigid Body
A rigid body is an object which does not change its shape or undergo any significant deformation due to an external force or movement. Mathematically speaking, the distance between any two points inside the body doesn't change in any situation.
Rigid Body Dynamics
Rigid bodies are defined as inelastic shapes with negligible deformation, giving them an unchanging center of mass. It is also generally assumed that the mass of a rigid body is uniformly distributed. This property of rigid bodies comes in handy when we deal with concepts like momentum, angular momentum, force and torque. The study of these properties – viz., force, torque, momentum, and angular momentum – of a rigid body, is collectively known as rigid body dynamics (RBD).
(II) A centrifuge rotor rotating at 9200 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 3.10 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?
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