Lesson 4 of 8 · Forces
Experiment⭐ 30 XP⚡ Spark LabInclined Planes and Ramps
Inclined Planes and Ramps.
🎯 Your mission
Run the experiment. Find out what really happens.
⚡ The twist
The opposite of what you expect is often what happens.
Mind = Blown
🎢 You feel weightless on a roller coaster because you and the seat are falling at the same speed.
Make a hypothesis first
Predict: what happens if you double the force?
What You'll Learn
An inclined plane is a flat, slanted surface, like a ramp, that makes lifting easier. Pushing a load up a gentle slope takes less force than lifting it straight up, though you must move it a longer distance.
Key Words
Tap a word to see its definition.
Materials Needed
- weights
- spring scale
Safety First
- Have an adult check your set-up before you start, and tidy everything away afterwards.
Steps
Look at the vocabulary words and write a definition for each in your own words.
Test friction: pull a weighted box across 4 surfaces (carpet, tile, sandpaper, foil). Use a spring scale to measure the force needed for each.
Look for patterns in your observations.
Make a graph or chart showing your results.
Check Your Understanding
Question 1
1 of 3Which simple machine is a ramp?
Where you see this in real life
You use this every time you flip a light switch, ride a bike, or kick a ball.
Stretch Challenge
Try this in real life this week.
Time how long a small ball rolls down something, then change the slope and try again.
For the dinner table
“Show me something at home that uses this kind of energy.”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
Ready?
Inclined Planes and Ramps
Run the experiment. Find out what really happens.
Full screen — no distractions
Checkout complete lesson on Forces for 4th Grade
Get the full Forces track as a printable PDF — all lessons, worksheets, and answer keys.