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An object has an initial momentum of mv and a final momentum of m(-v). What is the resulting change in momentum?

1. The starting momentum is mv.
2. The ending momentum is m(-v).
3. The difference in momentum is mv - m(-v) = 2mv.
4. The momentum does not vary.

Correct answer: The difference in momentum is mv - m(-v) = 2mv.

Solution

The change in momentum is correctly calculated as mv - m(-v) = 2mv, which follows from the definition of momentum and its change.

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