
if you want the image, go to the link http://www.google.co.in/imgres?um=1&hl=en&sa=N&biw=1440&bih=799&tbm=isch&tbnid=l21mJLaHihrM1M:&imgrefurl=http://www.chegg.com/homework-help/questions-and-answers/physics-archive-2012-february-29&docid=dIhBGldWeT4a-M&imgurl=http://s3.amazonaws.com/answer-board-image/c43be9b7-220a-4530-bbac-74d3ef95410a.jpeg&w=420&h=280&ei=gJ59T86kAcnqrAeg-bTeDA&zoom=1&iact=rc&dur=372&sig=109833217651107455227&page=2&tbnh=129&tbnw=194&start=27&ndsp=36&ved=1t:429,r:13,s:27,i:184&tx=156&ty=61
instead of that rod, think of a spring being in its place.




