55
Lesson 55 of 84 · Forces
ExperimentWheels and Axles (Part 2)
What You'll Learn
Friction helps you walk. Without friction, your feet would slip on the floor!
Key Words
- pull
- balance
- weight
Materials Needed
- toy cars
- ramps
- string
Safety First
- Protect your work surface with newspaper or plastic.
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 3What is a force?