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Physics

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A rock is dropped from a sea cliff 400m high.If the speed of sound is a constant 330 m/s, how long after the rock is dropped is the sound of the splash heard at the top of the cliff?

  • Physics -

    break the total sound into two parts:
    1) time for the rock to hit the surface.

    h=ho-4.9t^2
    t= sqrt(400/4.9) check that.

    2) time for the sound to go 400m
    t= 400/343

    check that

    add the two times.

  • Physics -

    ^acceleration is 9.8 as well. and wheres 343 from ?

  • Physics -

    Shut up

  • Physics -

    i tihnk that's a typo

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