36
Lesson 36 of 84 · Gravity
ExperimentFriction: The Force That Slows (Part 2)
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
- velocity
- momentum
- kinetic energy
Materials Needed
- tape
- ruler
- cardboard
- marbles
- paper clips
Safety First
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
- Dispose of materials properly after the experiment.
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?