Question
In which of the following cases least force is required to lift the block?
Answer: Option A
:
D
Greater the length of the effort arm and smaller the length of the load arm, lesser force will be required to lift the block. In the following lever, the length of the effort arm is greatest and the length of load arm is smallest, so least force will be required to lift the block in this case.
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:
D
Greater the length of the effort arm and smaller the length of the load arm, lesser force will be required to lift the block. In the following lever, the length of the effort arm is greatest and the length of load arm is smallest, so least force will be required to lift the block in this case.
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