Multiple Choice
The center of mass of a system of particles remains at the same place if:
A) it is initially at rest and the external forces sum to zero
B) it is initially at rest and the internal forces sum to zero
C) the sum of the external forces is less than the maximum force of static friction
D) no friction acts internally
E) none of the above
Correct Answer:
Verified
Correct Answer:
Verified
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