# Physics

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Which of the following statements are true? Select all that apply.
Impulse has units of mass times velocity.
During a collision, an object's linear momentum is equal to the magnitude of the impulse.
The impulse of a collision is equal to the duration of the collision multiplied by the average force during the duration.
The change in the magnitude of an object's linear momentum during a collision must be positive.

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2,3,4

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