APFIVE Internal and External Forces on a System
A system composed of two particles of mass m and 2m connected by a light, rigid rod is initially at rest. The system is then subjected to a time-varying external magnetic field. Which statement best describes a possible response of the system’s internal structure?
A
The rod length must change to maintain equilibrium
B
Internal forces remain constant regardless of the field
C
Internal forces may change as the field alters system dynamics
D
The particles must maintain fixed positions relative to CM
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