Lesson 42 of 84 · Forces

Simulation⭐ 30 XP⚡ Spark Lab

Stop and Go! (Part 2)

🧪Lab Brief #42

Stop and Go! (Part 2).

🎯 Your mission

Run the sim. Spot the pattern.

⚡ The twist

The opposite of what you expect is often what happens.

🤯

Mind = Blown

🔥 A bolt of lightning is 5 times hotter than the surface of the sun.

🔮

Make a hypothesis first

Predict: what happens if you double the force?

What You'll Learn

When you stop pedaling a bike, it slowly stops because of friction.

Key Words

start
heavy

Steps

Step 1 — Read

Talk about Forces with a grown-up. What do you already know?

Step 2 — Do

Try pulling a wagon with one hand, then two hands. Which is easier?

Step 3 — Observe

What happened? Tell a grown-up what you noticed.

Step 4 — Record

Tell a grown-up your favorite part of the activity.

Check Your Understanding

Question 1

1 of 3

Does a ball bounce?

How sure are you going to be?😐 maybe

🌍

Where you see this in real life

You use this every time you flip a light switch, ride a bike, or kick a ball.

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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.

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For the dinner table

“Show me something at home that uses this kind of energy.”

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Next Smart Experiment

We'll pick an experiment that matches exactly how you're thinking right now.

🧲Share card

Share this experiment

Send it to a parent who's looking for a 10-minute kitchen science win.

🖨️

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