Accepted Answer
Class I . . . The fulcrum is between the effort and the load.The mechanical advantage may be any positive number, more or less than ' 1 '.Class II . . .The load is between the fulcrum and the effort. The mechanical advantage is always greater than ' 1 '.Class III . . .The effort is between the fulcrum and the load.The mechanical advantage is always less than ' 1 '.
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