physics

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A person standing at the edge of a seaside cliff kicks a stone over the edge with a speed of vi = 11 m/s. The cliff is h = 55 m above the water's surface, as shown below.

How long does it take for the stone to fall to the water?

  • physics -

    The initial speed, which is horizontal, does not matter. You only need to solve the equation for vertical motion.

    55 m = (g/2) t^2 = 4.9 t^2

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