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March 25, 2017

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A canon mounted on a pirate ship fires a cannonball at 125 m/s horizontally, at a height of 17.5m above the ocean surface. Ignore air resistance. (a) How much time elapses until it splashes into the water? (b) How far from the ship does it land?

  • physics - ,

    a. Vo*t + 0.5g*t^2 = 17.5 m.
    0 + 4.9t^2 = 17.5
    t^2 = 3.57
    Tf = 1.89 s. = Fall time.

    b. D = Vo * Tf = 125m/s * 1.89s = 236 m.

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