Yes, air rushing against an airplane is an example of friction. This force is called drag. It reduces the speed of the plane.
An inclined plane reduces friction when kinetic energy is present. If the object is in motion down the ramp, then there would be gravity assisting it downwards. The normal force would decrease, as well as the friction. For rough surfaces there usually is more friction than smooth surfaces. For instance, if a car travels on an unpaved road, it travels slower due to friction. Compare that to a paved road and the car moves a lot faster.
no, it just reduces it
Lubbricant
oil in a car's engine reduces viscous friction and wear
Yes, air rushing against an airplane is an example of friction. This force is called drag. It reduces the speed of the plane.
The friction on the plane is the friction produced due to air.
An inclined plane reduces friction when kinetic energy is present. If the object is in motion down the ramp, then there would be gravity assisting it downwards. The normal force would decrease, as well as the friction. For rough surfaces there usually is more friction than smooth surfaces. For instance, if a car travels on an unpaved road, it travels slower due to friction. Compare that to a paved road and the car moves a lot faster.
reduces
speed
Friction.
no, it just reduces it
Lubbricant
oil in a car's engine reduces viscous friction and wear
It reduces the coefficient of friction.
POMBO
The angle of friction is defined as the angle of a plane where a body placed on the plane will start to slide.