physics

A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 s later. If the speed of sound is 340 m/s, how high is the cliff?
vo= 0; s=340 m/s; t= 3.2s
h=?

t1+t2= 3.2 s
t2= 3.2-t1

I used Eq: h= vo*t^1+1/2at^2

rearranged eq.
h= (4.9)(t)^2
t^2= h/4.9

t^2= 340/4.9= 69.38 s
substitute--> 69.38=3.2-t^1
t^1= -66.18 s

Sorry, I don't know if I am doing this right.I still can't figure out how to get h=?

  1. 👍 0
  2. 👎 0
  3. 👁 75
asked by Lya
  1. d=1/2at^2
    t=3.2s (this time includes both the time taken for the rock to fall and the time taken by sound to travel to the listener from the ocean)

    from s=d/t
    t=d/s
    change in time=t-d/s
    therefore d=1/2a(t-d/s)^2
    d=1/2(9.8)(3.2-d/340)^2
    work this out and solve for d, which is the height of the cliff

    1. 👍 0
    2. 👎 0
    posted by Minenhle

Respond to this Question

First Name

Your Response

Similar Questions

  1. physics

    A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.3 later. If the speed of sound is 340 , how high is the cliff?

    asked by Katie on September 17, 2010
  2. College Physics

    A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 6.4 s later. If the speed of sound is 340 m/s, how high is the cliff?

    asked by Marcus on February 2, 2010
  3. Physics

    A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 5.2 seconds later. If the speed of sound is 340 m/s, how high is the cliff?

    asked by wtfrd on September 4, 2007
  4. physics

    A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 4.1s later. If the speed of sound is B40 m/s, how high is the cliff? ____m

    asked by Anonymous on September 9, 2012
  5. Physics

    A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.7 s later. If the speed of sound is 340 m/s, how high in meters is the cliff?

    asked by Waqar Siddiqui on September 19, 2007
  6. Scientific studies

    A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 s later. If the speed of sound is how high is the cliff?

    asked by Aly on February 17, 2010
  7. Physics

    A rock is dropped from a sea cliff, and the sound of it striking the ocean is heard 3.2 seconds later. If the speed of sound is 340 meters per second, how high is the cliff?

    asked by Lucie on October 18, 2007
  8. college physics

    eng physics a rock is dropped at sea cliff at the sound of it striking the ocean if head 3.4 seconds later. If the speed of sound is 340m/s how high is the cliff?

    asked by anthony on October 1, 2010
  9. Physics

    A rock is dropped from a sea cliff and the sound of it striking the ocean is heard 3.9 s later. If the speed of sound is 340 m/s, how high is the cliff? i know you use the equation y=(initial velocity)(time) +

    asked by Marissa on July 2, 2012
  10. college physics( hey bob)

    I posted this quesiotn and got some help but still don't know how to do it. could i please get a little more assistance please. I don't know how to solove for the time of falling or sound without the variable height. eng physics a

    asked by anthony on October 1, 2010

More Similar Questions