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.​

Answer 1

Answer:

Because

The pressure exerted by the sharp knife edge is more than that exerted by the blunt one because the area on which force is exerted with a sharp knife is very small. Thus, it is easier to cut with the former than with the latter.