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