Lesson 58 of 84 · Forces
Experiment⭐ 30 XP⚡ Spark LabWhat Slows a Car Down? (Part 2)
What Slows a Car Down? (Part 2).
🎯 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
Brakes on a bike use friction to slow down and stop. Press the brakes and friction does the work!
Key Words
- weight
- strong
Materials Needed
- weights
- tape
- ruler
Safety First
- Keep small objects away from young children.
- Work in a well-ventilated area when using vinegar or other strong-smelling substances.
Steps
Read the introduction. What is this lesson about?
Test a magnet on 10 objects around your house. Make a list of what sticks and what doesn't.
Look for something that changed. What is it?
Circle the correct answer on your worksheet.
Check Your Understanding
Question 1
1 of 3What kind of surface has the most friction?
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.
Checkout complete lesson on Forces for 2nd Grade
Get the full Forces track as a printable PDF — all lessons, worksheets, and answer keys.