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Q.

A bottle opener is an example of:


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a

{"mathml":"<math class="image_resized" style="width:16px;height:11px"><span style="font-family: Order lever

b

{"mathml":"<math class="image_resized" style="width:20px;height:12px"><span style="font-family: Order lever

c

{"mathml":"<math class="image_resized" style="width:20px;height:12px"><span style="font-family: Order lever

d

None of these 

answer is B.

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Detailed Solution

Concept- In the instance of a bottle opener, the output is located at the close end and the fulcrum is located at the far end. In order to properly respond to the query, we must ascertain what kind of lever has this configuration.
 We are aware that several sorts of levers are present in rudimentary devices.
Depending on where the force is exerted, where the fulcrum and load are located, and other factors, many types of levers are used.
The point at which the lever is held steady while it rotates is referred to as the fulcrum.
A bottle opener's output force is halfway between its fulcrum and its input force.
Option 1 is erroneous since a bottle opener is not a first-class lever because the fulcrum of first-order levers lies between the load and the effort.
The load is positioned between the fulcrum and force in the case of the second class lever, making. Option 2 is the best alternative. This is exactly how a bottle opener works, with the fulcrum positioned at one end so that it may be supported. The load, which is the cap that has to be opened, is positioned between them, and the force needed to do so is applied from the opposite end.
Option 3 is wrong since the force imparted to third class levers lies between the fulcrum and the load. So it is obvious that this is not how the bottle opener would behave.
Hence, the correct option is 2.
 
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A bottle opener is an example of: