A sharp edge blade is more effective in cutting than a blunt blade due to .

Small contact area

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Large contact area

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Low pressure

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Low force

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Solution

The correct option is A
Small contact area

In a blunt blade, the force applied on blade spreads over a large area as compared to sharp blade. Consequently, the pressure of the force applied is much more in sharp blade, and hence it is more effective in cutting an object.

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It is difficult to cut cloth using a pair of scissors with blunt blades. Explain.

Question 26
It is difficult to cut cloth using a pair of scissors with blunt blades. Explain.

Give scientific reasons;

(1) The ships entering fresh water from sea water sink to a greater extent.

(2) The cutting edges of tools like knives, blades etc are provided with sharp edges.

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