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: Constant force?

  1. Oct 6, 2004 #1
    It is true that whether using one rubber band or a bunch, a constant displacement will result in a constant increase in force?

    I did this experiment in school and both experiements gave me a linear line for Force vs Displacement.
     
  2. jcsd
  3. Oct 6, 2004 #2

    Diane_

    User Avatar
    Homework Helper

    That's Hooke's Law. To a close order of approximation, as long as you aren't near the elastic limit, yes.
     
  4. Oct 6, 2004 #3

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    I'm not quite sure what you mean by "constant" in this context, urbanXrisis:

    We say that we have a LINEAR relationship between force and displacement if (for example) a doubling of the displacement causes a doubling of the force.
    In the case of rubber band (or a bunch of them), modelling the force/displacement as a linear relationship is close enough to reality to be called true..(up to a point, that is..)

    Was this what you were asking about?
     
  5. Oct 6, 2004 #4
    yes, thanks for the replys, it helped me out
     
  6. Oct 6, 2004 #5

    Pyrrhus

    User Avatar
    Homework Helper

    Urban, also consider

    Straight Line Equation

    [tex] y = mx + b [/tex]

    Hooke's Law

    [tex] F = kx [/tex]
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook