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Physics HW- falling Bodies, Part 2

  1. Nov 6, 2013 #1
    1. The problem statement, all variables and given/known data

    A brick is accidentally dropped from a window of a tall building and falls 160 m to the ground. How long does it take the brick to reach the ground?

    2. Relevant equations[/b
    y=y initial+v inital +1/2 (αt^2)




    3. The attempt at a solution
    y=0+0+9.8 m/s^2(t)
    y=1/2(9.8 m/s^2)t
    t^2 =2y/a
    t=√2(160 m)/9.8 m/s^2
    = √32.65 s
    t=5.72 s

    Is t=5.72 s the right answer?

    Thank you!
     
  2. jcsd
  3. Nov 6, 2013 #2

    Doc Al

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    Staff: Mentor

    You got it. :thumbs:
     
  4. Nov 6, 2013 #3
    Thank you!
     
  5. Nov 7, 2013 #4
    Could you possibbly look at my part 3 problem when you have a moment? Another user and I are waiting for someone to clarify. Thank you!!
     
  6. Nov 7, 2013 #5

    Doc Al

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    Staff: Mentor

    See my response.
     
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