5
Lesson 5 of 84 · Forces and Motion
ExperimentFriction: The Force That Slows
What You'll Learn
Friction is a force that opposes motion between surfaces that touch. Rough surfaces create more friction than smooth ones. Without friction, you could not walk or grip objects.
Key Words
- inertia
- speed
Materials Needed
- tape
- ruler
- cardboard
- marbles
- paper clips
Safety First
- Do not look directly at the sun or bright lights.
Steps
Step 1 — Read
Read and learn: Friction is a force that opposes motion between surfaces that touch. Rough surfaces create more friction than smooth ones. Without friction, you could not walk or grip objects.
Step 2 — Do
Create a labeled diagram of what you built or observed.
Step 3 — Observe
Draw a picture of what you observe.
Step 4 — Record
Answer the questions based on your data.
Check Your Understanding
Question 1
1 of 3What does friction do?