For example, If you grip a door handle normally you can open it with ease. But why is it that it’s so much harder if you move your hand closer to the base of the handle?
In: Physics
moment forces. When you have a lever, the further away you are from the point of rotation (in this case, the base of the handle), the easier it is to move. Think of a wrench. If you try to loosen a bolt with your hand, it’s going to be near impossible to turn. But when you use a wrench, it’s far easier due to the length of the wrench.
Lots of maths and stuff behind it, but that’s the gist of it
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