30
Lesson 30 of 84 · Forces
ExperimentBalancing on One Foot
What You'll Learn
A pendulum swings back and forth using the forces of gravity and momentum.
Key Words
- strong
- force
Materials Needed
- stopwatch
- pencils
- toy cars
- ramps
- string
- weights
Safety First
- Wear safety goggles when mixing liquids.
Steps
Step 1 — Read
Talk about what you already know about Forces.
Step 2 — Do
Build a simple lever with a ruler and pencil. Try lifting objects on one end by pushing the other.
Step 3 — Observe
Compare what happened to what you predicted.
Step 4 — Record
Tell the class one thing you learned today.
Check Your Understanding
Question 1
1 of 3Does a seesaw use a lever?