Recent content by deliciousiron

  1. D

    Can't understand why work done on a spring is given by .5fx^2

    yea, that was a typo. but i don't understand why the 40n's weight _isn't_ constant
  2. D

    Can't understand why work done on a spring is given by .5fx^2

    Homework Statement "a metal wire of diameter .23mm and unstretched length 1.405 is suspended vertically from a fixed point. when a 40n weight was suspended from the lower end of the wire, the wire stretched by an extension of 10.5mm. calculate the work done on the spring."i know the formula for...