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You throw a ball downwards with a speed of 10 m/s. It hits the ground 4 meters below from where you threw it. How long is the ball in the air and what is the ball’s velocity just before it hits?

  • physics - ,

    vf^2=vi^2+2ad where a=9.8m/s^2, vi=10m/s

    solve for vf. then,
    Vf=vi+gt Vf is negative, vi is -10, g is -9.8m/s^2 solve for t

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