Expert Sir, please clarify-Why are the handles of a pair of scissors smaller than its blades while the handles of a pair of shears longer than the blades? Both are 1st class lever.

Asked by ankitkhuntia(student), 2 days, 23 hours ago

A scissor is used to cut mainly paper or cloth. These are soft substances. So, less mechanical advantage is sufficient to cut them. Hence, the effort arm is small.

A shear is used to cut iron nails or wires or some other hard things. So, high mechanical advantage is required to cut them. Hence, the effort arm is long.

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