1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

PE and KE of a water balloon

  1. Apr 11, 2008 #1
    A prankster drops a water balloon from the top of a building on an unsuspecting person on the sidewalk below. If the balloon is traveling at 30.3m/s when it strikes a person's head ( 1.5m above ground). How tall is the building? Neglect air resistance.

    PE= KE
    h= v^2/2g
    h=918.09 m^2/s^2 / 19.62 m/s/s
    h= 46.8m

    total height = 1.5m + 46.8m = 48.3m
    is this right? Is the sig figs right?

    Thank you
  2. jcsd
  3. Apr 11, 2008 #2
    Looks right.
  4. Apr 12, 2008 #3
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: PE and KE of a water balloon
  1. KE and PE (Replies: 3)

  2. KE And PE and Work? (Replies: 17)

  3. PE and KE problem (Replies: 3)

  4. Pe and Ke problem (Replies: 5)