Physics

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If you drop a 1.0 kg weight from a height of 1.0 m, how many joules of kinetic energy will it have when it reaches the ground?

Can I use the equation for work: W = F*s to find the kinetic energy?
Or would I have to find the velocity of the weight as it falls because I'm not sure how to do that.

  • Physics -

    You can do it either way.
    The work done (by gravity) is
    M*g*H = 9.8 Joules
    That equals the final kinetic energy.

    Vfinal = sqrt(2 g H)
    (1/2)M*Vfinal^2 = M g H

  • Physics -

    48.02J

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