Apentix/AP Physics 1/Unit 5: Momentum/Question

AP Physics 1easymcq1 pt

A system's total momentum is unchanged during a collision even though individual momenta change. This is because

A.internal forces obey Newton's third law and cancel

B.kinetic energy is conserved

C.the forces are very brief

D.mass is conserved

Explanation

Core Concept

Every internal impulse on one object has an equal-opposite impulse on another, so the total is preserved.

Correct Answer

Ainternal forces obey Newton's third law and cancel

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