Which of the following statements is correct ?

Q: Which of the following statements is correct ?

(a) Work done against friction taking body up an inclined plane is more than that in moving it through the same distance on a horizontal surfaces of the same nature

(b) The work done against friction is directly proportional to the force with which the surfaces are pressed together

(c) Friction increases the time taken by a body projected upwards to reach the highest point

(d) None of the above

Ans: (b)