(II) A figure skater can increase her spin rotation ratefrom an initial rate of 1.0 rev every 1.5 s to a final rate of 2.5 rev/sIf her initial moment of inertia was 4.6 kg .m2 what is her final moment of inertia? How does she physically accomplish this change?
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 figure skater can increase her spin rotation rate
from an initial rate of 1.0 rev every 1.5 s to a final rate of 2.5 rev/s
If her initial moment of inertia was 4.6 kg .m2 what is her final moment of inertia? How does she physically accomplish this change?
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