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: A Spring in a Conservation of Energy Problem?

  1. Mar 11, 2004 #1
    Not totally lost but for the most part.. i'm pretty lost..

    A Block of mass m = 7.20 kg is released from rest at a heigh of H = 9 m on a curved frictionless ramp. At the foot of the ramp is a spring whose spring constant is k = 306 N/m. What is the maximum compression of the spring, x?

    Alright so using conservation of energy, i got the final velocity to be 13.2816 m/s. The "ramp" becomes flat, and is frictionless, so there is no acceleration, correct?
    This is where i am stuck.
    The only thing i can think of to find the maximum compression of the spring is: F = -Kx

    Is there anything else i can do? Or is there something i am missing?

  2. jcsd
  3. Mar 11, 2004 #2
    You'd have an easier time with a simpler energy argument.

    [tex]E_e = \frac{1}{2}kx^2[/tex]

    Where [itex]E_e[/itex] is the elastic energy due to the compression in the spring.

  4. Mar 11, 2004 #3
    Elastic potential energy?

    Would that just be the potential energy before the block begins to move at the top of the ramp?
  5. Mar 11, 2004 #4
    Wow, I got it. Thanks alot. Very much appreciated.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook