A dynamometer is like a machine that helps you measure how powerful something is. Imagine you have a toy car, and you want to know how much force it takes to make it move. You put the car on the dynamometer, and it tells you exactly how much force you need to make it go.
The dynamometer works by using a special sensor that can tell how much force is being applied to it. When you push or pull something, the dynamometer can sense the force and measure it. It's kind of like a scale that measures weight, but instead of measuring how heavy something is, it measures how much force is being applied.
People use dynamometers for lots of different things. For example, car companies use them to test how strong their engines are. They can attach the engine to the dynamometer and see how much power it produces. This helps them figure out how fast the car can go and how much weight it can carry.
And that's basically it! A dynamometer is a machine that helps you measure how powerful something is by sensing the force that's being applied to it.