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Physical Sciene

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A cannon is fired horizontally from a top of a 15-m platform. What is the cannon balls horizontal speed when it hits the ground 250 m downrange?

  • Physical Sciene -

    The time (t) that it takes to hit the ground is determined by the height above ground. For horizontal firing,
    t = sqrt(2H/g) = 1.749 s

    The horizontal speed must be (at all times)
    250/1.749 = 143 m/s

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