โ† Learn
Physics ยท Lesson 1

Forces & Motion

A push, a pull, a stop, a slide. Why things move โ€” and why they sometimes don't.
Scene 1 ยท A force is a push or a pull

Every move starts with a force

Open a door โ€” that's a push. Pull on your sock โ€” that's a pull. Kick a ball, drag a chair, blow on a feather. Every time something starts moving, stops moving, or changes direction, a force did it.

Forces aren't always visible. Gravity is a pull. Magnetism is a pull or push. Even the wind is a force.

๐Ÿ‘‹ โ†’ ๐ŸŽˆ โ† ๐Ÿคœ
Push from one side, pull from the other โ€” the balloon goes whichever way is stronger.
Scene 2 ยท Friction

Why a sliding ball stops

Roll a ball on the carpet โ€” it stops fast. Roll it on a smooth floor โ€” it goes further. Roll it on ice โ€” almost forever. The thing slowing it down is friction โ€” the rough touching between two surfaces.

Without friction, you couldn't walk! Your shoe pushes back on the ground; the ground pushes you forward.

Carpet (lots of friction)
Ice (very little friction)
Scene 3 ยท Newton's first law

Things keep going unless something stops them

An old man called Isaac Newton figured this out 350 years ago: a moving thing keeps moving in a straight line until a force changes it. A still thing stays still until a force pushes it.

That's why you wear a seatbelt โ€” when the car stops suddenly, your body wants to keep going. The belt is the force that stops you safely.

Scene 4 ยท Bigger push, bigger move

Stronger force, more speed

Push a toy car gently โ†’ it rolls slowly. Push it hard โ†’ it zooms. Same car, different force.

And heavier things need a bigger push. That's why pushing a shopping trolley full of food is much harder than an empty one.

โ˜… The Big Idea

Nothing moves without a force

Every push, every pull, every fall, every stop โ€” there's a force somewhere doing the work. Newton said: force = how heavy ร— how fast it changes speed. Big push + small thing = big speed. Small push + heavy thing = barely moves.

Look around right now. Pick anything. What forces are on it? (Hint: gravity is on everything.)