This lab involves a spool that has a crank on it and also has a string wrapped around it several times with a mass hanging on the edge of the string hanging vertically. 4.)Suppose, the cord where it is attached to the post, is under tension during the experiment. Would this lead to error in your measured value of the mechanical equivalent of heat? If so, would you value be too large or too small? I would say there would not be an error because the tension will be equal to the frictional force so the value of work would not change since mechanical equivalent= work/heat the value would not change. I don't know if I'm correct however. Please help! Thanks!!! Guys!