Uma: Friction depends on the nature of the surface. Usha: Friction is independent of area of contact, 

Monjur Alahi

Uma: Friction depends on the nature of the surface. 

Usha: Friction is independent of area of contact, 

A) Uma is correct, Usha is incorrect 

B) Uma is incorrect, Usha is correct 

C) Both Uma and Usha are correct 

D) Both Uma and Usha are incorrect


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Salim Ahmed Kawsar

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C) Both Uma and Usha are correct

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