Ton-force is a way of measuring how strong something is, like how much it can push or pull. Imagine you have a toy truck and you want to see how strong it is. If you put a ton of heavy things on top of it, the toy truck won't be able to move because it's too heavy for the truck's strength. A ton-force is the amount of weight that it takes to make something not move when it is being pushed or pulled.
But why do we use a "ton" as a measurement? Well, a long time ago, people used to measure weight using big rocks. They found that a certain amount of weight was equal to one ton. So when we say "ton-force", we mean a certain amount of weight that is equal to one ton.
So, if something has a ton-force of 5, that means it can push or pull up to 5 tons of weight without moving. It's like when you're playing tug-of-war with your friends, and you're so strong that you can pull them all over to your side without them being able to make you move at all.
In summary, ton-force is a way to measure how strong something is by determining the amount of weight it can push or pull without moving.