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March 29, 2017

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A rock thrown horizontally at a large bell 54.0 m away is heard to hit the bell 4.80 s later. If the speed of sound is 330 m/s, what was the speed (in meters/second) of the rock? (Disregard gravity.)

  • College Physics - ,

    Let V be the rock horizontal velocity.

    (Rock travel time) + (sound travel time) = total time delay = 4.80 s

    54/V + 54/330 = 4.80

    54/V = 4.636 seconds

    Solve for V, in m/s

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