Every time you walk, run, or watch a car stop, a hidden helper is at work. It is called friction.
Friction is the rubbing force between two things that touch. It pushes against sliding.
No friction means everything would slip and slide forever — you could never stop!
👉 Tap Next to start the adventure.
A bumpy surface makes more friction, so a sliding box stops sooner. A smooth surface makes less friction, so it slides far.
Pick a floor, then push the box! 📦
Which floor lets the box slide the farthest? Try all three!
When you walk, your foot pushes backward on the ground. Friction grips your shoe and pushes you forward. No grip = no go!
Tap the shoe to see the grip in action.
Try walking on a slippery wet floor — your feet slide because there is too little friction.
When the driver presses the brake, pads squeeze the wheels. Friction turns the moving energy into heat and the car slows down.
Press harder for more braking friction. Stop the car before the wall! 🧱
More friction = stops faster. That is why brakes (and shoe soles) are made rough and grippy!
Sometimes friction helps us, and sometimes we want less of it. Drag each card into the right basket!
Hint: grip and stopping need lots of friction. Smooth gliding needs little.
Mia drops a marble. It rolls a long way on the tiles but stops fast on the grass. Why?
Great work, science star! Next time you walk or see a car stop, you'll know friction is on the job. 🌟