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Force

Adapted from Wikipedia · Explorer experience

A ball falling under gravity, captured in multiple positions to show how distance increases over time — a fun physics demonstration!

What is Force?

Force is something that makes things move, change shape, or stay still. Imagine pushing a swing or pulling a toy — that’s you using force! Force helps us understand why things move or don’t move.

How We Measure Force

We measure force in newtons (N), named after the scientist Sir Isaac Newton. If something weighs 50 newtons, it means the force of gravity pulling it down is 50 newtons.

Why Force Matters

Force is very important in understanding how things move. It helps explain Newton’s three laws of motion. These laws tell us that objects stay still unless a force pushes them, and that bigger forces make things speed up more.

Everyday Forces

There are many kinds of forces we see every day. Gravity pulls us down, keeping us from floating away. Friction slows things down, like when your shoes grip the ground while you walk. Normal force is what makes a table hold up a book. And elastic force is what makes a pogo stick’s springboard bounce.

Force is all around us, helping everything from swings to planets move the way they do!

Images

Portrait of the famous scientist Isaac Newton from 1689.
Portrait of Galileo Galilei, the famous astronomer and scientist, painted by Justus Sustermans.
Diagram showing how a mass attached to a spring moves according to Hooke's Law in physics.
Scientists testing a powerful new instrument called GRAVITY at an observatory in Chile, designed to study black holes and distant stars.
A bust of the ancient Greek philosopher Aristotle, on display at the Louvre Museum.
Illustration showing how to add two vectors together to find the resultant vector.
Animation showing how force creates torque and angular momentum in a rotating object.

This article is a child-friendly adaptation of the Wikipedia article on Force, available under CC BY-SA 4.0.

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