a lock and key is an example of frist class of lever. true or false
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in the figure a hammer and pliers
They both belong to second class levers.Hence option I is correct.
both are not type of simple machine.Hence option II is wrong.
In second class lever the fulcrum is on one end and force on other and load in middle of these two. Hence optio III is wrong.
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your answer will be true
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