Science Class 5 Other

Asked by AKSHAY GURU VARADHARAJAN · SRI CHAITANYA TECHNO SCHOOL, JAYANTI NAGAR.

Why is a sharp knife a more effective 'wedge' than a blunt knife?

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A It has a larger surface area.
B It has a longer handle for better grip.
C It has a thinner, more gradual inclined plane that requires less force to cut.
D It is made of heavier metal.

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Answer: C. It has a thinner, more gradual inclined plane that requires less force to cut.

Answer: C) It has a thinner, more gradual inclined plane that requires less force to cut.
Explanation: A wedge is two inclined planes joined back-to-back. The thinner the edge, the less force is needed to overcome the resistance of the material being cut.

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Why is a sharp knife a more effective 'wedge' than a blunt knife?

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