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!

Not Understanding Constraints

  1. Feb 2, 2013 #1
    I have no idea what constraints are, nor do I understand why they are important.

    I get where the constraints in these two examples come from, but not why they're significant.

    These seem to be relationships between variables, and not much of a "constraint" in the sense I know the word.

    Can someone give a quick definition or some insight into this?

    Attached Files:

  2. jcsd
  3. Feb 3, 2013 #2

    Simon Bridge

    User Avatar
    Science Advisor
    Homework Helper

    If I chained you to a wall - the length of the chain is a constraint on your motion. The size of the wall is another one.
    I'm pretty sure you would be able to tell why these constraints were important.
    There are quite a few - you understand why the wedge being constrained to move only horizontally is significant right?

    So which ones do you have trouble with?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook