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    When you push down on one side, the other side goes up. A lever helps

                         you lift or move something heavy by using less force.

                         • Inclined Plane (Ramp): When you
                         want to push something heavy up,

                         like a box, it is easier to slide it up
                         a ramp instead of lifting it straight

                         up. The ramp (inclined plane) helps
                         reduce the effort.

                      Working Principle

                      Simple  machines  work  by  either

                      changing the direction of the push or pull (like with a pulley or lever) or
                      reducing the amount of push or pull needed to move something (like with

                      a ramp or screw). This way, you do not have to work as hard to move or
                      lift heavy objects.

                      Simple machines are all around us, and we use them every day. Here are
                      some examples:

                                                 •  Scissors (Lever  and  Wedge):  When  you  cut  paper

                                                with scissors, you are using a simple machine called
                                                a  lever.  The  blades  are  also  wedging  that  help  cut

                                                through the paper.

                         • Wheelbarrow           (Wheel         and       Axle):       A

                         wheelbarrow has a wheel and an axle. The wheel
                         helps make it easier to carry heavy things, like

                         dirt or rocks, from one place to another.

                                                                       •  See-Saw (Lever): At the park, when
                                                                      you play on a see-saw, you are using
                                                                      a lever. When you push down on one

                                                                      side, the other side goes up.

                           16    RoboGenius (V1.0)-II

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