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M2 Question help quickish plz watch

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    The impulse can be considered as a change in momentum
    Since the masses are constant, then the changes are in velocity only.

    Truck A
    15000*dv = 30000
    dv=2 m/s
    i.e. 8 m/s -> 6 m/s
    so, new speed of A = 6 m/s
    =================

    Truck B
    10000*dv = 30000
    dv=3 m/s
    i.e. 4 m/s -> 7 m/s
    so, new speed of B = 7 m/s
    =================

    KE before collision = 1/2*15000*8^2 + 1/2*10000*4^2
    = 480,000 + 80,000
    = 560,000 Nm
    =========

    KE after collision = 1/2*15000*6^2 + 1/2*10000*7^2
    = 270,000 + 245,000
    = 515,000 Nm
    =========

    So, loss in KE = 560 - 515
    = 45 kNm
    ======
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    I handed it in this morning
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