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Read the Following Selection
Read about levers, or click on the play button below to listen aloud.
A lever is a simple machine. It moves a load. A load is the thing being moved. A lever is a bar. It balances on a support, or fulcrum. Moving the support changes how much effort is needed.
Push down on the lever to lift the rock up.
Sometimes the support is in the middle of the lever. A see-saw in the park is a lever. The support on a see-saw is in the middle.
Sometimes the support is close to one end. A wheelbarrow is this type of lever. The wheel is the support. You pull up on the handles of a wheelbarrow. Moving a heavy load is easier in a wheelbarrow.
Did You Know?
Hockey sticks and baseball bats are levers. Your hands are the support for both of these levers.
Now, show what you know!
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1. What is a lever?CorrectIncorrect
2. What is a load?CorrectIncorrect
3. What is a fulcrum?CorrectIncorrect
4. Kitchen tongs are an example of a lever.CorrectIncorrect
5. Are scissors an example of a lever?CorrectIncorrect