Question

Explain why? A. A sharp knife cut objects more effectively than a blunt knife B. The tip of sewing needle is sharp C. A wide belt is provided over the wheels of an army tank.

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Answer 1

Answer:

When they are sharp, they exert high pressure even for small amount of force, which makes our work easier..

Wide belt is used so that the wheels do not get stuck in small patches of mud in the war..