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ICSE Class 10 Answered

Explain why scissors for cutting cloth may have blades longer than the handles but shears for cutting metals have short blades and long handles 
Asked by lovemaan5500 | 13 Mar, 2018, 02:05: PM
answered-by-expert Expert Answer
Scissor and metal cutting shear are class-I lever. For scissor, small movement at effort(at handle) should make long movement of load arm , so that it can cut longer lengths of cloth/paper. Hence blades are longer than handle. But in metal cutting shear, we need large mechanical advantage to overcome the resistive load while cutting metal sheets. Hence its handle(load arm) is made longer than its blades.
Answered by Thiyagarajan K | 13 Mar, 2018, 07:50: PM

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