This simple machine helps keep the lightbulb stay up on the ceiling!  When you use this machine, you turn it in a circle and it changes the direction of the force to down.  This is the most secure way of attaching two things together.

     This simple machine is made up of an inclined plane wrapped around a nail.  There is a tradeoff with this machine.  There is a lot less force with this than a wedge, but the force is applied over a much larger distance!

     Which simple machine is it?