Topic: vectors

Measurement scales and vectors

We often talk about quantities and measurements. When we say Millie weighs 6 kilograms, her tail is 25 centimeters long, and today it’s 23 degrees, we are using numbers and units of measurement: kg, cm, and degrees Celsius. Each unit of measurement refers to a measurement scale. Here are some exampl...…

in macroscopic concepts

Angular momentum

Angular momentum is about how things spin. It's a sort of “spinning power” of something that’s turning or rotating. Big heavy things that spin quickly have a lot of spin power. Imagine you’re on a playground merry-go-round. If you’re sitting near the edge, and the merry-go-round is spinning, you...…

in macroscopic concepts

What's a force?

Force is like an invisible push or pull that makes things start, stop, speed up, slow down, or change direction. When you kick a ball — that’s force! When you open a door — that’s force! When wind pushes your kite up — nature is using force! We described many types of force her...…

in macroscopic concepts