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Why do they divide by 2kg and not 1kg (momentum)?

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    Question:

    Two identical objects each of mass 1kg collide. After the collision teh loss of momentum for one of the objects is 120kgms^-1.

    Answer:

    They rearrange deltap = mv. But the thing is they use mass as 2kg, two of the objects why not 1kg? Surely its the momentum of one object?
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    (Original post by BrainJuice)
    Question:

    Two identical objects each of mass 1kg collide. After the collision teh loss of momentum for one of the objects is 120kgms^-1.

    Answer:

    They rearrange deltap = mv. But the thing is they use mass as 2kg, two of the objects why not 1kg? Surely its the momentum of one object?
    Can you post a picture of the exact question please?


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    Thank you boss

    (Original post by Kyx)
    Can you post a picture of the exact question please?


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    (Original post by BrainJuice)
    Name:  ata.PNG
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    Thank you boss
    OH I'm so sorry! They wrote 2kg, I thought hey wrote 1kg! Thank you nevertheless
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    Because they each have a mass of 2, you misread!
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    (Original post by BrainJuice)
    Name:  ata.PNG
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    Thank you boss
    The mass is 2kg, not 1kg


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