Question

what is liver and fulcrum?​

Answer 1

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• A lever is an example of a simple machine that is used to move an object. That object is also called the resistance. A lever has an arm that is supported at one place while force is pushed, pulled, or lifted at another place on its arm. The force is also called the effort. The place at which the lever is supported is called the fulcrum, or the pivot. By moving the fulcrum, using more effort, or making the lever longer, the user can increase the mechanical advantage.

• The fulcrum is the thing in the middle that allows you and a friend to pivot up and down. Also, it’s the screw in the center of a pair of pliers or a pair of scissors that allows both sides to pivot. A fulcrum is basically any pivot point in any lever system that allows one to change the direction and/or amount of force required to do work. Now, energy cannot be destroyed or created, so when I say “reducing force,” I really mean you exchange force for distance. Think of using pliers, grabbing the crew directly is not really possible, the pliers function as levers on a fulcrum. This allows you to squeeze the pliers with your entire fist strength, but you are squeezing a distance much greater than the size of the screw. The fulcrum is the pivot point in a lever system.

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Answer 2

The lever is a movable bar that pivots on a fulcrum attached to a fixed point. ... It shows that if the distance a from the fulcrum to where the input force is applied (point A) is greater than the distance b from fulcrum to where the output force is applied (point B), then the lever amplifies the input force.

Examples:

see-saw, bottle opener,