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As a block of wood with the mass of 2.00 kg slides along a floor, it's speed decreases from 4.0 m/s to 1.0 m/s. How much kinetic energy does it lose?

  • Physics -

    Kinetic energy is defined with
    K = 1/2*m*v^2

    so you have Kf - Ki

    [1/2(m)(vf)^2] - [1/2(m)(vi)^2] =

    m = mass
    v = velocity; f for final, i for initial
    your answer will be in kg * m/s^2
    which is the developed way of writing Newtons because 1 kg * m/s^2 = 1 N

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