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A 2.0-kilogram object moving with a velocity of 5.0 m/s in thepositive x direction strikes and sticks to a 3.0-kilogram objectmoving with a speed of 2.0 m/s in the same direction. How much kinetic energy is lost in this collision?

    2.4 Joules
    9.6 Joules
    5.4 Joules
    0.6 Joules

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