Rubbing Slows Things

Lab Brief #11

🎯 Your mission

Master the concept. Use it tomorrow.

⚡ The twist

The opposite of what you expect is often what happens.

What you'll learn

Things slow down and stop because the ground rubs against them. That is friction!

Key words

Make a hypothesis first

Predict: what happens if you double the force?

Say your guess out loud — then find out if you were right.

Step 1 of 3 · Read

Say the vocabulary words out loud. Can you repeat them?

Step 2 of 3 · Observe

Look closely! What do you see?

Step 3 of 3 · Record

Draw a picture of what you learned today.

Question 1 of 3

What is it called when things rub and slow down?

Question 2 of 3

Does a rolling ball stop by itself after a while?

Question 3 of 3

Which is easier to slide on?

Mind = blown

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

Nice work!

You got 0 of 3 right.

🎯

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

✨ More to explore

🌍 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 it 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.”

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

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