Lubricant

A lubricant is a slimy liquid that makes things go smoother. Imagine trying to push a cart or toy car on a gravelly or bumpy road, it will be hard to move and may even stop at times. But if you put some slimy stuff on the wheels, it will make it easier for the cart or car to move forward without getting stuck.

In the same way, when two items rub against each other like gears or metal part; they can create friction which causes them to heat up and can wear out quickly. Lubricant, such as oil or grease, is applied between the two parts to make the rubbing smooth and reduces the friction. Think of it as putting butter or lotion on our skin, which makes it feel softer and smoother.

This slimy liquid can be in various forms. It could be a thick liquid like honey or a sticky paste, like toothpaste, that stays in place and doesn't splatter around. Lubricants can also be thin and fluid-like water, such as the oil you put in your car's engine. They all have different properties and different purposes.

Just like how our skin needs moisturizer to keep from getting dry and cracking, the parts of machines need lubricants to prevent them from getting worn down, breaking, or making a lot of noise. It is essential to use the correct lubricant for the job and to apply it in the right way to make sure things run smoothly.