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27 September, 12:27

A 4kg mass traveling eastwards at 4m. s per second collides with a 3kg mass traveling westward as 8m. s per second ... calculate the total momentum of mass before they colide

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  1. 27 September, 12:47
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    The following instructions are my idea.

    P=m*v

    1. notice that the to masses move in opposite directions - > one has positive and one has negative speed

    2. P1=4 * (-4) = - 16[kg*m/s]

    P2=3*8=24[kg*m/s]

    3. Add the momentums:

    P1+P2=-16+24=8[kg*m/s]

    The total momentum of mass equals 8 kg*m/s
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