Given particles of masses m, 2m, and 3mat points (0, 1), (1, 0), and (2, 3), find the point Pabout which their total moment of inertia will be least. Recall that to find the moment of inertia of mabout P, you multiply mby the square of its distance from P.
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).
Given particles of masses m, 2m, and 3mat points (0, 1), (1, 0), and (2, 3), find the point
Pabout which their total moment of inertia will be least. Recall that to find the moment
of inertia of mabout P, you multiply mby the square of its distance from P.
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