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Lesson 68 of 84 · Simple Electricity
ExperimentSimple Machines: The Lever (Part 3)
What You'll Learn
Simple machines make work easier by changing the direction or amount of force needed. The six simple machines are lever, pulley, inclined plane, wedge, screw, and wheel and axle.
Key Words
- speed
- direction
- force
Materials Needed
- spring scale
- stopwatch
- pencils
- toy cars
- ramps
- string
Safety First
- Do not mix unknown chemicals together.
- Tie back long hair before starting the experiment.
Steps
Step 1 — Read
Read about Simple Electricity and write down three key facts.
Step 2 — Do
Build a simple motor using a battery, magnet, wire, and paper clip supports. Observe how electromagnetic forces create rotation.
Step 3 — Observe
Compare the before and after states.
Step 4 — Record
Write your conclusion: did the results match your hypothesis? What would you change next time?
Check Your Understanding
Question 1
1 of 3Which is NOT a simple machine?