Q. Which of the following statements is not true
A) The coefficient of friction between two surfaces increases as the surface in contact are made rough
B) The force of friction acts in a direction opposite to the applied force
C) Rolling friction is greater than sliding friction
D) The coefficient of friction between wood and wood is less than 1
Explanation
(c) Sliding friction is greater than rolling friction
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.