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Which one of the following statements is...

Which one of the following statements is correct?

A

If there were no friction, work need to be done to move a body up an inclined plane is zero.

B

If there were no friction, moving vehicles could not be stopped even by locking the brakes.

C

As the angle of inclination is increased, the normal reaction on the body placed on it increases.

D

A duster weighing 0.5 kg is pressed against a vertical board with force of 11 N. If the coefficient of friction is 0.5, the work done in rubbing it upward through a distance of 10 cm is 0.55 J.

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