26
Lesson 26 of 84 · Energy
ExperimentSprings and Elastic Energy
What You'll Learn
A force is a push or pull that can change an object's motion, shape, or direction. Forces are measured in Newtons and can act through contact or at a distance.
Key Words
- inclined plane
- wedge
Materials Needed
- ramps
- string
- weights
- tape
- ruler
- cardboard
Safety First
- Clean up spills immediately to prevent slipping.
Steps
Step 1 — Read
Read about Energy and write down three key facts.
Step 2 — Do
Test friction: pull a weighted box across 4 surfaces (carpet, tile, sandpaper, foil). Use a spring scale to measure the force needed for each.
Step 3 — Observe
Draw a detailed diagram of what you observe.
Step 4 — Record
Write a conclusion: what did your results show? Did they match your prediction?
Check Your Understanding
Question 1
1 of 3What does Newton's third law state?