Find out more about the inclined plane, the pulley and the screw. Find out more about three of the six simple machines: the inclined plane, the pulley and the screw. These simple machines make work ...

When you push or pull with a simple machine, you are applying a force and doing work. And, if you get more force out of a machine than you put into it, then that machine has a mechanical advantage.

Let's face it: when you don't know how to use weight machines, they're intimidating as heck. All those knobs, pulleys, and bars? Are you supposed to push or pull? Do you sit up straight? Sideways?

Where: Walking Mountains Science Center, Avon. When: Saturday, Oct. 7, 2-4 p.m. Cost: $10. More information: This is not a drop-off program; guardian participation is ...