Which of the following statements best describes the work done by kinetic friction on…
PHYSICS · Single correct · CBSE · Physics · Laws of Motion · Laws of Motion
Problem
Which of the following statements best describes the work done by kinetic friction on an object that slides across a horizontal surface?
(a) It is positive and equals μkNd.
(b) It is negative and its magnitude equals μkNd.
(c) It depends only on the initial and final positions, not on the path taken.
(d) It is zero because the friction force is perpendicular to the displacement.