One thought on “2012 S4 EOY P1 Q08”

  1. Total energy at P is:
    KE: 0 J
    GPE: mgh = 500 x 10 x 10

    Total energy at Q is:
    KE=½mv² = ½ x 500 x 8.0²

    The difference between these 2 (the energy loss) can only be accounted for as work done against friction.

    K.E. = f(x)

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