• A chain accelerates a wheel as it unwinds and falls to the ground.
  • Illustrates the problem of deriving the formula for the speed of a chain as it leaves a solid disc.

        (mount board on clamping stand)
        (place red link over peg on wheel, keep tension on chain as you wind it)
        (wheel must be a minimum of 5' above the floor)
        (chain weighs 603 g)