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Q: An oar used to row a boat has a handle 160 cm from the fulcrum and the blade 40 cm from the fulcrum What is the ideal mechanical advantage of the oar?
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What type of lever are knives?

The knife is a third class lever. The pressure is applied to the other end of the handle nearest to the blade and the fulcrum is at the end of the handle nearest to the wrist.


Why would sharpening a knife or ax blade improve its mechanical advantage?

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Knife is what classification of levers?

A knife can be classified as a Class 1 lever. The classification of levers is based on the relative positions of the effort (force applied), the fulcrum (pivot point), and the load (resistance or object being moved). In a Class 1 lever: Fulcrum (F): The fulcrum is located between the effort and the load. Effort (E): The effort is applied on one side of the fulcrum. Load (L): The load is on the other side of the fulcrum. In the case of a knife: Fulcrum (F): The point where the knife pivots, usually where the handle meets the blade. Effort (E): The force applied by the user to cut or slice through the food. Load (L): The resistance or the material being cut, such as vegetables, meat, or other food items. When you use a knife, you apply force (effort) on the handle, causing the blade to pivot around the fulcrum and exerting force on the material being cut (load). Class 1 levers are characterized by their balanced arrangement, where the effort and load are on opposite sides of the fulcrum.


What are the parts of hacksaw?

The handle, the bow and the blade.


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Tin snips are similar to scissors - they are a combination of two wedges (the blades) and two levers (each blade and the handle it connects to) joined at a fulcrum (the hinge.)There are many types of simple machines. Tin snips would be a first class lever, as the fulcrum(pivot) is in the middle.


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Technically, it is. Each blade is a lever, with the axle being the fulcrum of each lever.


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What is a explanation about lever and wedge to make scissors?

Scissors work as both levers and wedges. The lever part of the scissors is the handle being the input force (Fin), and the blade being the output force (Fout). The middle of the scissors that only turns and moves the smallest distance is the fulcrum. The fulcrum is what make the scissors a lever by having a "jack" for the scissors to sit on while the blade does all the cutting. The way to see if the lever is efficient or inefficient, you calculate the mechanical advantage of the lever. Mechanical advantage is calculating output force (Fout) by the input force (Fin) in Newtons. In the end. since you are dividing two numbers using the same unit (Newtons) the units cancel each other out. Therefore, leaving you with a number with no units of measurement to go with the final quotient. E.G MA= Fout/Fin = 3N/1N = 3 Scissors can also be used as a wedge. You see, (a) wedge(s) is/are (an) object(s) that split(s) (an)other object(s) apart. Scissors work as a wedge because the blades push whatever you are cutting apart from each other. Finally, making a pair of scissors a wedge and a lever.


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