Solid friction, like viscosity is
A
independent of the surface area in contact
B
independent of the relative motion between layers
C
dependent on normal reaction
D
in opposition to motion
Verified Correct Answer: D.
Physical Principles & Numerical Solution
The force acting on a body due to the viscous resistance of the surrounding fluid is called the drag force and it acts in the direction opposite to the direction of motion. So also does friction.
Source: Myschool Past Questions Archive (Record #35651)