There are six simple machines. They make it easier for us to do work. An inclined plane is one kind of simple machine. It is a smooth, sloped surface. Inclined planes help to move things to a higher level. A ramp is an inclined plane. Imagine that you have a heavy box. You need to move it from the ground and up three steps. The box is too heavy to pick up. You could get a friend to help you carry it. .....