NUTRITION
THE HUMAN BODY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Simple machines that help us apply force
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Point on which things rotate or are balanced i.e. joints in the human body
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The thing that needs to be moved
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The thing that is applied to move the load e.g. muscles
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Detailed explanation-1: -A lever is a bar or board that rests on a support called a fulcrum. A downward force exerted on one end of the lever can be transferred and increased in an upward direction at the other end, allowing a small force to lift a heavy weight.
Detailed explanation-2: -When you use a machine, you apply force to the machine. This force is called the input force. The machine, in turn, applies force to an object. This force is called the output force.
Detailed explanation-3: -Hence, the force applied to move an object by the lever is called the effort.
Detailed explanation-4: -(d) A lever is a simple machine consisting of a rigid rod which is capable of turning around a pivot called a fulcrum. It has three parts, namely, effort, load and fulcrum. Fulcrum: The rod of the lever rests on it and the lever rotates about it. Load: The weight lifted by the liver is called the load.