Fall arrest is a system used to keep people safe when they are working high up, like on a roof or platform. It's like a special safety net that catches people if they fall, so they don't get hurt.
First, the person puts on a special harness that fits around their body like a seatbelt. This harness is connected to a strong rope or cable that is attached to something secure, like a building or structure. This rope is usually made of a special material that won't break easily.
If the person falls, the harness pulls tight and stops them from falling all the way to the ground. The rope or cable is designed to absorb some of their weight and slow them down gently.
Fall arrest systems are very important for people who work in dangerous places high up, like construction workers or window cleaners. They help keep them safe and prevent serious injuries or even death.