On a car, its air friction plus rolling resistance of the tyres
Not necessarily.
the force that opposes the motion of two touching surfaces is velocity.
the force that opposes the motion of two touching surfaces is velocity.
Friction is the force that opposes motion between two objects.
opposes motion
the force that opposes the motion of two touching surfaces is velocity.
Such force is called viscosity..the force produces in liquid and opposes the motion of fluid and also the motion of the objects in fluid..it is also called the internal friction..
Viscous force
friction
Friction.
No. It is a force that opposes motion.
The force that opposes motion when moving objects over a surface is called friction