PHYSICS · Single correct · AP · Physics 1: Algebra-based · Force and Translational Dynamics · Force and Translational Dynamics
Problem
In the context of rotational kinematics, under which condition is it valid to model a collection of particles as a single particle located at its center of mass?
(a) All external torques on the system are zero.
(b) Internal rotation of the collection is negligible for the quantity being analyzed.
(c) The net external force on the collection is zero at all times.
(d) The mass of the collection is uniformly distributed.