Question

What is the basis of classification of levers?

Answer 1

Hint:A lever is a basic mechanism made out of a beam or stiff rod that pivots around a fixed fulcrum. A lever is a stiff body that can rotate around a central axis. The lever is classified into three kinds based on the fulcrum, load, and effort positions. Leverage is also defined as a mechanical advantage acquired in a system. Renaissance scientists classified it as one of the six basic machines. Leverage occurs when a lever amplifies an input force to produce a larger output force.

Complete step by step answer:
The relative locations of the fulcrum, effort, and resistance are used to classify levers (or load). The input force is commonly referred to as effort, while the output force is referred to as load or resistance. By comparing the relative positions of the fulcrum, resistance, and effort, three kinds of levers may be identified:

Class I — Fulcrum between the effort and resistance: A seesaw, a crowbar, or a pair of scissors, a common balance, or a claw hammer are examples of class 1. The effort is exerted on one side of the fulcrum and the resistance (or load) on the other. The mechanical advantage might be higher, lesser, or equal to one.

Class II – Between the effort and the fulcrum, there is resistance (or load): In a wheelbarrow, a nutcracker, a bottle opener, or the brake pedal of a car, where the effort is placed on one side of the resistance and the fulcrum is on the other, the load arm is smaller than the effort arm, and the mechanical advantage is always larger than one. It's also referred to as a force multiplier lever.

Class III - Effort between the fulcrum and resistance: A set of tweezers, a hammer, a pair of tongs, a fishing rod, a standard balance, or the mandible of our skull serve as the resistance (or load) on one side of the effort and the fulcrum on the other. The load arm is shorter than the effort arm. The mechanical advantage is never more than one. The speed multiplier lever is another name for it.

Note:The lever is a moveable bar that pivots on a fixed point called a fulcrum. The lever works by applying forces at various distances from the pivot, or fulcrum. Those farther from the pivot move faster than points closer to the pivot when the lever revolves around the fulcrum. Because power is the sum of force and velocity, a force applied to a point farther from the pivot must be smaller than a force applied to a point closer in.