Friction depends on:

A. Area of contact A.

B. Weight of the object B.

C. Nature of the surfaces C.

D. Both b and c D.

Correct Answer: D সঠিক উত্তর: D

Explanation ব্যাখ্যা

Friction depends on both B) Weight of the object and C) Nature of the surfaces.
Weight of the object: The heavier the object, the greater the normal force exerted on the surface, leading to a higher friction force.
Nature of surfaces: The roughness or smoothness of the surfaces in contact determines how much resistance there is to movement, with rougher surfaces causing more friction.

Why other options are incorrect:
Area of contact: While a larger contact area might seem to increase friction, it's actually the normal force (influenced by weight) and the nature of surfaces that are the primary determinants. Experiments have shown that friction is relatively independent of the actual area of contact, unless there are significant changes in the surface properties.

Practice MCQ for SSC, UPSC, RRB Exams

Correct Answer: D সঠিক উত্তর: D

Explanation ব্যাখ্যা

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