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14 March, 19:09

If both mass and speed are doubled, what happens to its momentum?

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  1. 14 March, 19:26
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    The general formula is: Momentum = (mass) x (speed)

    I never like to just write a bunch of algebra without explaining it.

    But in this particular case, there's really not much to say, and

    I think the algebra will pretty well explain itself. I hope so:

    Original momentum = (original mass) x (original speed)

    New momentum = (2 x original mass) x (2 x original speed)

    = (2) x (original mass) x (2) x (original speed)

    = (2) x (2) x (original mass) x (original speed)

    = (4) x (original mass) x (original speed)

    = (4) x (original momentum).
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