AP Physics 1easymcq1 pt
The total momentum of a system is conserved if the net external force is zero
A.even if internal forces are large
B.only when internal forces vanish
C.only during elastic collisions
D.only when no objects touch
Explanation
Core Concept
Internal forces come in third-law pairs and cancel within the system; only external forces change total momentum.
Correct Answer
Aeven if internal forces are large
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