Radian per second

When we talk about radian per second, we're talking about how quickly something is spinning around in a circle. A radian is a fancy way of measuring an angle, kind of like how we use degrees to measure angles. Instead of dividing a circle into 360 degrees, we divide it into 2π radians. That sounds like a weird number, but it's just a fancy way of saying that a circle has 6.28 "slices" or "pieces" if you want to think about it that way.

Now, back to radian per second. When something is spinning around in a circle, it's moving a certain number of radians per second, kind of like how a car is travelling a certain number of miles per hour. If something is spinning at a rate of one radian per second, that means it's going around the circle once for every second that passes. It's just like how a clock's second hand goes around the face of the clock once per second.

So, when we talk about how fast something is spinning, we usually use units of radian per second. It's a way of measuring the angle the object has gone around the circle in a given amount of time. And, just like miles per hour measures how quickly a car is moving, radian per second measures how quickly something is spinning around in a circle.