Renewable Energy Sources

What You'll Learn

A lever is a rigid bar that rotates around a fixed point called a fulcrum. Seesaws, scissors, and bottle openers are all examples of levers that multiply force.

Key Words

pulley
inclined plane
wedge

Materials Needed

blocks
spring scale
stopwatch

Safety First

Protect your work surface with newspaper or plastic.
Adult supervision recommended.
Do not taste any materials.

Steps

Step 1 — Read

Read and learn: A lever is a rigid bar that rotates around a fixed point called a fulcrum. Seesaws, scissors, and bottle openers are all examples of levers that multiply force.

Step 2 — Do

Conduct the experiment by following the instructions.

Step 3 — Observe

Compare the before and after states.

Step 4 — Record

Write your conclusion: did the results match your hypothesis?

Check Your Understanding

Question 1

1 of 3

Which is a renewable energy source?