Scissors for cutting a cloth may have blades longer than the handles,but shears for cutting metals have short blades and long handles.Why?
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Both belong to class I levers.
For class I levers,Mechanical advantage is given by
MA=Effort arm / Load arm
It may be >,= or < 1.
For cutting cloths less mechanical advantage is required than for cutting metals. Therefore scissors may have blades much longer than the handles,On the other hand shears for cutting metals have short blades and long handles.
Explanation:
Scissors for cutting a cloth may have blades longer than the handles,but shears for cutting metals have short blades and long handles