“Every day you use machines without even thinking about it. A machine is anything that helps make work easier. Basic tools like staplers, screwdrivers and scissors are simple machines. These machines are all based on simple inventions like levers, planes, pulleys or wheels.”
Students learned in a different way the following facts of simple machines. (More information on the importance of teamwork can be found at the entrance of September 12)
• A lever is a stiff board or bar that rests on a base called a fulcrum. The fulcrum lifts and moves objects. Scissors, pliers, rakes and staplers are all types of levers.
• A pulley has a rope and wheels. It can be used to pull things up. An old-fashioned well uses a pulley to pull water from underground.
• A wedge has a pointed end. It can be driven into something to separate it. An axe is a wedge. So is a nail.
• A wheel and an axle is a type of simple machine. A wheel has a rod, or axle, running through it. Your bicycle wheel has a wheel and axle.
• An inclined plane has a slope that takes you from a lower surface to a higher one. A sloped sidewalk is an inclined plane. A dump truck and a roller coaster also have inclined planes.
• A screw is an inclined plane wrapped around a rod. It holds things together securely.
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