Ques 4) write the classes of levers on which the following devices are worked and also mention their mechanical advantages:- i) See-saw ii) Pliers ili Bottle opener iv) Nut cracker v) Spade vi) Knife Draw the diagrams of all machines
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write the classes of levers on which the following devices are worked and also mention their mechanical advantages:- i) See-saw ii) Pliers ili Bottle opener iv) Nut cracker v) Spade vi) Knife Draw the diagrams of all machines
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