Two objects having the same mass travel toward each other on a flat surface, eac

Question

Two objects having the same mass travel toward each other on a flat surface, each with a speed of 10 meter per second relative to the surface. The objects collide head on and are reported to rebound after the collision, each with a speed of 20 meters per second relative to the surface. Which of the following assessments of this report is most accurate?

Momentum was not conserved, therefore the report is false.

If potential energy was released to the objects during the collision, the report could be true.

If the objects had different masses, the report could be true.

If the surface was inclined, the report could be true.

If there was no friction between the objects and the surface, the report could be true.

Explanation / Answer

Momentum was not conserved, therefore the report is false.

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