That would be Friction. (:
The unbalanced force that opposes motion between touching surfaces is called friction. It acts in the opposite direction of the applied force and depends on the nature of the surfaces and the force pressing them together. Friction can be reduced by using lubricants or by increasing the smoothness of the surfaces.
Friction
Friction will resist the motion between two touching surfaces.
friction
Friction. Static friction.
A force that resists motion between two touching surfaces and always acts opposite to the direction of motion is called friction. Friction will slow down a car when the brakes are applied.
Friction
Friction is an opposing force; the kinetic energy of the movement of the two touching surface will be converted to heat energy.
Friction
Friction
Force of friction
the greater will strike opposing the motion
Friction will resist the motion between two touching surfaces.
Friction
Mucous membrane.
friction
that is frictionfriction
a contact force that acts to resist sliding between two surfaces that are touching.