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anonymous

  • one year ago

An object's speed is 2.40 m/s and its momentum is 120.0 kg * m/s. What is the mass of the object? A. 290 kg B. 0.0200 kg C. 12.0 kg D. 50.0 kg **not sure!! thank you!!

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  1. Michele_Laino
    • one year ago
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    here we have to apply the definition of momentum P of a particle, whose mass is m, and whose velocity is v: \[P = mv\]

  2. anonymous
    • one year ago
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    ohh okay!! so 2.4 * 120? = 288? so about 290? choice A is our solution?

  3. Michele_Laino
    • one year ago
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    no, it is: \[\Large m = \frac{P}{v} = \frac{{120}}{{2.4}}\]

  4. anonymous
    • one year ago
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    ohh okay so 50? our solution is choice D?

  5. Michele_Laino
    • one year ago
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    correct!

  6. anonymous
    • one year ago
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    yay! thank you!!

  7. Michele_Laino
    • one year ago
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    thanks!! :)

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