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Which of the following is a first order lever?
A) Lemon Squeezer
B) Handle of a simple hand pump
C) Cutting of bread with bread knife
D) Opening or closing of a door

Last updated date: 20th Jun 2024
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Hint: First order lever is a lever that has the centre of gravity between weight and force. Its command is seen as force-full-cross weight. This type of lever is the most basic. The input force and load on the other side of the fulcrum are possible from a first-order heel. Hence, based on the relative moment of arms with the lever and out lever, either a power or a velocity advantage can be obtained.

Complete step by step solution:
A lever is a simple machine made of a brace or rigid rod rotating to a fixed hinge or centreline. A lever is a rigid body that can spin on an individual stage. The lever is classified into three groups depending on the place of pivot, load and effort. A leverage in a mechanical device is also a mechanical advantage. It is one of the six basic devices that Renaissance scientists have found. A lever amplifies an input force in order to provide a more powerful lever. The mechanical advantage of the lever is the ratio of the output power to the input force.

The centre of gravity is between load and tension in a first-class lever.
The emphasis lies between the load and the effort in a first-class lever. If the pivot is closer to load, less effort is necessary to shift the load. If the emphasis is closer to the load, therefore a shorter load gap takes less work. In order to move the load more distantly, the centre of gravity is closer to effort. Both examples of first-class levers are a teeter totter, a car jack and a crowbar. First-class levers are very effective in the heightening of large loads.

Note: A lever is a beam linked to the earth by a pivot or pivot known as the pivot. The perfect heel does not dissipate or hold energy, meaning that the beam does not flex or friction. The power in the heel equals the power output and the power output to the input force ratio is determined by the size ratio of the focal length to the points where these forces will be applied.