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. Rubber soles is lighter than that of a leather B. Rubber soles can be easily washed and cleaned C. Rubber gives a better appearance D. Rubber provide more friction than leather
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
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A. Momentum B. Kinetic energy C. Potential energy D. Both B and C
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A. Momentum and kinetic energy B. Kinetic energy alone C. Momentum alone D. Neither momentum nor kinetic energy
A. It helps him to gain energy B. It helps to apply large force C. It gives him larger amount of inertia D. To increase reaction forces