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!

Homework Help: The slingshot question

  1. Nov 20, 2007 #1
    This one has me stuck, any help would be greately appreciated, cheers, mac

    A slingshot fires a pebble from the top of a building at a speed of 14.0m/s. The building is 31.0m tall. Ignoring air resistance, find the speed with which the pebble strikes the ground when the pebble is fired (a) horizontally, (b) vertically straight up, (c) vertically straight down.
  2. jcsd
  3. Nov 20, 2007 #2


    User Avatar
    Science Advisor
    Gold Member

    You'll need the y-component of your initial velocities. What are they for each of those 3 scenerios?

    Start with that and see how far you get.
  4. Nov 21, 2007 #3
    haha do ur physics homework urself, or dr bao will get u :@:@ haha only kiddin mate, u worked out any of the answers yet,
    thanks dilo
  5. Nov 21, 2007 #4
    Start with the good old-fashioned equations of motion in the x- and y-directions:



Share this great discussion with others via Reddit, Google+, Twitter, or Facebook