The figure shows four groups of three or four particles of equal mass moving parallel to either the x axis or the y axis, with speeds of the same magnitude. Order the groups according to the magnitude of the center of mass velocity, starting with the largest.
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).
The figure shows four groups of three or four particles of equal mass moving parallel to either the x axis or the y axis, with speeds of the same magnitude. Order the groups according to the magnitude of the center of mass velocity, starting with the largest.
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