👉 Speedometers are devices that measure the speed of an object moving along a straight line. They typically consist of two or more lights on a dashboard, which show how fast the vehicle is going. In simple terms, they are like a radar that helps drivers see how fast their car is going and when to make turns or stop. The higher the speedometer, the faster your car is going, but if it's too high, you may need to slow down or stop. Speedometers can be used