The Great Friction Battle

NESA Accredited Teacher Chemistry & Physics Specialist

Creator of the LAB™ Learning System

Weave two books together page by page — then try to pull them apart. Sounds easy? Now add water. What changes?

7-12 yrs

Easy

15 min

Stage 2, Stage 3

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The Great Friction Battle

NESA Accredited Teacher
High school chemistry & physics specialist 30+ years
The Crazy Scientist in primary schools — 15 years

International conference presenter on science education
Creator of the LAB™ Learning System
Curriculum aligned: NSW Science & Technology K–6 (2024)

[Copyright Notice]

A picture is worth a thousand words — check this out and see if you can spot the science hiding in plain sight.

What you will need

Two softcover books with as many pages as possible (old phone books, catalogues, or magazines work perfectly — the more pages, the better!)
A cup of water
Two strong volunteers!
A towel (for the wet round)

How to do it

1

Set up the battle

Place the two books facing each other with the pages open wide.
The page edges should point toward each other so the pages can be woven together.

Start by slightly overlapping the open books in the middle.

3

The Dry Challenge

Each volunteer grabs a spine firmly — fingers around the spine, not the pages. On the count of three: PULL!

5

Pull Again!

Grab the spines again. On the count of three: PULL! Compare the effort to the dry round.
Were the wet pages easier or harder to separate?

2

Weave the pages

Begin alternating pages — one from the left book, one from the right — working from the front of the books toward the back.
Take your time. The more pages you interleave, the stronger the effect. Aim for at least 50 pages from each book.

4

The Wet Challenge

Wiggle the books side to side to separate the pages.
Pour a cup of water slowly over the open interleaved pages and push the spines back together. (same number of pages touching)
Allow 10–15 seconds for the water to soak in.

Did it work? Share the science! Tag @the_crazy_scientist on Instagram — we love seeing your experiments!

The Crazy Scientist Lab System™

Every experiment follows The Crazy Scientist Lab System™ — a simple way to help kids think like real scientists.

LINK to what they already know,
ACTIVATE curiosity through hands-on discovery
BUILD understanding that actually sticks.

Have you ever slipped on a wet floor? Struggled to hold something with soapy hands? Everyone knows water makes things slippery.

So here's your prediction challenge: if you weave two books together page by page — then pour water on the pages — do you think the wet pages would be EASIER or HARDER to pull apart than the dry ones?

Make your prediction. Then get ready for one of the biggest surprises in science.

No glue. No clips. Just pages — so why couldn't you pull them apart?

Friction is the force that pushes back whenever two surfaces try to slide. One page on another creates almost none. But you had hundreds of pages all touching at once.

Friction stacks. Add up hundreds of tiny forces and you need an enormous force to overcome them all.

Now the wet round.

Water reduces friction on smooth surfaces — tiles, glass, metal. But paper is made of tiny fibres. Water grips into those fibres instead of lubricating them, pulling the pages together through surface tension and capillary adhesion.

On paper, water acts like a weak glue — not a lubricant. That's why wet was harder.

You've just discovered that the same substance — water — does completely opposite things on different surfaces.

On smooth surfaces (glass, tiles, metal): water gets between the surfaces and reduces friction. Things slip.

On fibrous surfaces (paper, fabric, skin): water grips into the material and increases adhesion. Things stick.

Now apply that to a new situation: step out of the shower onto a smooth tile floor — slippery.

Step onto a bath mat — not slippery. Same wet feet. Same water. Why the difference?

"Want the full teacher guide? The Crazy Scientist Lab includes classroom delivery tips, how to manage the WOW moment, differentiation for Stage 2 & 3, — ready to teach tomorrow."

Think Like a Scientist

Scientists don't just do ONE experiment; they change one part of the experiment (independent variable) and then see how it affects another part of the experiment

(dependent variable)

Change ONE variable and test again.

What happens if you weave more pages together — do the books become harder or easier to pull apart?

What if you tried magazines with glossy pages instead of plain paper — does the surface change the result?

🧪 Try it! Change ONE thing and test again. What did you discover?

The Science Behind It

Friction acts between any two surfaces in contact, pushing back against sliding.

One page on another creates almost none — but interleave two books and you've stacked hundreds of surfaces at once. Each adds a little. Together, they add up to an enormous force. No glue, no lock — just friction multiplied.

Wet pages surprise everyone.

Water lubricates smooth surfaces like glass and tiles — but paper is fibrous and porous. Water grips into the fibres instead, pulling pages together through surface tension and capillary adhesion. The wet books are harder to separate, not easier.

Curiosity spark: If water makes fibrous surfaces grip harder, why does soaked paper eventually fall apart? What's happening to those fibres over time?

Want the full explanation — plus how to turn this into a real force investigation with measurements? That's inside The Crazy Scientist Lab.

Know a parent or teacher who'd love this? Send it on! 👇

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