Air brake (rail)

An air brake is something that helps trains slow down and stop. Just like how we use brakes on a bicycle or a car, trains also need brakes to stop. These brakes work by using air pressure to squeeze special brake shoes against the train's wheels.

Here is how it works: when the train needs to stop, the engineer (the person who drives the train) uses a special handle to release air from the train's brake system. When the pressure drops, the brake shoes press against the wheels, and the train starts to slow down. The more air is released, the harder the brake shoes press against the wheels, and the slower the train becomes.

Now, you might be wondering where this air pressure comes from. Well, there is a special device called an air compressor that is connected to the train's engine. This compressor fills up a large tank with air, which is then used to power the brakes. In fact, the air brake system is so important for trains that it is required by law in many countries.

So, next time you see a train coming to a stop, remember that it's all thanks to the magic of air brakes!