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: Energy Problem

  1. Oct 14, 2008 #1
    1. The problem statement, all variables and given/known data
    A 1.79-kg block slides down a frictionless ramp, The top of the ramp is h1 = 1.54 m above the ground; the bottom of the ramp is h2 = 0.287 m above the ground. The block leaves the ramp moving horizontally, and lands a horizontal distance away. Calculate the distance.

    2. Relevant equations

    3. The attempt at a solution
    I used mg(delta h)=1/2mv^2 to get velocity in the x direction
    Then used y=1/2at^2 to find time, I had Viy = 0, g = 9.81 and y = .287

    I can't find the distance traveled am I doing something wrong?
  2. jcsd
  3. Oct 14, 2008 #2


    User Avatar
    Homework Helper

    Why not?

    It looks like you are all over the method.

    You have V2 = 2gh1

    You have T2 = 2h2/g

    T2*V2 = X2 = 4h2*h1
  4. Oct 14, 2008 #3
    I did it your way as well, but still the wrong result. Ugh, can you work it out and see what you get I got, 1.33 m.
  5. Oct 14, 2008 #4


    User Avatar
    Homework Helper

    Actually my h1 was the difference between 1.54 and the .287.

    Sorry I didn't see the problem labeled those heights similarly.
  6. Oct 14, 2008 #5
    Thanks, I got it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook