In the last question, you found the time when the curve r(1) = (,e.31, e-) !3! has a tangential component of acceleration equal to zero. At this time which of the following is true: The acceleration vector at this time points in the same direction as the unit tangent, T O The acceleration vector at this time points in the same direction as the principal unit normal, N O The acceleration vector at this time points in the same direction as the binormal vector, B The acceleration vector at this time points in the same direction as the velocity vector.
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).
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