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WedgeInclined Plane
Screw
Wheel and Axle
Lever
Pulley
Simple machines are useful because they can make a physical job easier by changing the magnitude or the direction of the force exerted to do work.
Have you ever tried to unscrew a nut, bolt, or screw from something with your bare hands and discovered that it was just too tight to loosen even if you had a good grip?
You got the proper tool, such as a screw driveror wrench, and unscrewed it!
Why is it that it's so easy to unscrew with a tool when you can't with your bare hands?
The wrench and screw driver are examples of a wheel and axle, where the screw or bolt is the axle and the handle is the wheel. The tool makes the job easier by changing the amount of the force you exert.
Axle
Wheel
All of the simple machines can be used for thousands of jobs
from lifting a 500-pound weight to making a boat go. The
reason why these machines are so special is because they make
difficult tasks much easier.
Fulcrum
Lever
Load
Click Here to Learn More
Click on the dude to learn more.
A screw is an inclined plane wrapped around a post.
Click on the light bulb to learn more.
Two inclined planes make a wedge.
Try to catch the saw to learn more.
Axle
Wheel
Click on the windmill to learn more.
Wheel
Rope This box is easier to lift because of the pulley. Click on it to learn more.
Have you learned it all yet? Let’s look at a worksheet to see.
Click Here
Click above
Now it’s time to link to Inspiration. When you get there, all of the simple machines are shown. Create some clouds around each picture and add some examples for each simple machine. Click below to begin.
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