390
Lesson 390 of 500 · Extra Passages
⭐ 30 XPSimple Machines
📖Story Brief #390
Simple machines are tools that make work easier.
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Simple machines are tools that make work easier. They help us move heavy objects or change the direction of a force. There are six types of simple machines: lever, pulley, wheel and axle, inclined plane, wedge, and screw. For example, a lever, like a seesaw, uses a long arm to lift something heavy with less effort. When you push down on one side, the other side goes up, making it easier to lift the weight.
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Question 1
1 of 2What is a lever?
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Simple Machines
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