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!

Work of spring

  1. Oct 23, 2009 #1
    1. The problem statement, all variables and given/known data
    A spring has a natural length of 30 cm. If a 21 N force is required to keep it stretched to a length of 35 cm, how much work W is required to stretch it from 30 cm to 41 cm? (Round your answer to the nearest hundredth.)


    2. Relevant equations

    41cm-30cm=11cm so its .11m
    21n=.35mk k= 21/.35 k=60 so f(x)= 0 to .11 of 60x so the integration is 30x^2 |0 to .11

    so it should be 30(.11)^2 = 363/1000


    3. The attempt at a solution
     
  2. jcsd
  3. Oct 24, 2009 #2

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    What is your question?

    Yes, what you have doneis correct. Since you are told to "Round your answer to the nearest hundredth." your answer should be 0.36 Joules. (Don't forget the units, "Joules"- that's an important part of the answer.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Work of spring
  1. Work done on a spring (Replies: 4)

  2. Work, Springs (Replies: 1)

Loading...