Which of the following statements about the concept of solid friction is NOT true?
A
It always acts in the direction of motion
B
It causes wear and tear in car tyres
C
It depends on the nature of the surfaces in contact
D
It is independent of the area of the surfaces in contact.
E
It reduces the efficiency of the machine
Verified Correct Answer: A.
Physical Principles & Numerical Solution
No expanded working has been attached for this question yet. The verified answer is Option A.
Source: Myschool Past Questions Archive (Record #42933)