A. Sine of the angel of friction B. Cosine of the angel of friction C. Tangent of the angel of friction D. Cotangent of the angel of friction
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A. Ball and roller bearing B. Lubrication C. Polishing D. All of the above
A. Increase if the surface is inclined B. Decrease if the surface is inclined C. Remains the same whether the surface is inclined or horizontal D. None of these
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A. Increase with an increase in velocity B. Decrease with an increase in velocity C. Remains unaffected due to a change in velocity D. None of these
A. Equal to each other B. Not equal to each other C. Proportional to each other D. None of these
A. It will decrease B. It will increase C. It will remain same D. None
A. Lost some electrons B. Gained some electrons C. Gained some protons D. Lost some protons