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Friction
In a fluid, the force of friction tends to increase when the speed increases. The exact relationship, however, is far from simple.
Friction tends to do that.
The friction between two stationary forces is called static friction. It is the friction that resists two objects to start moving against each other. Once in motion, the friction between two forces is called dynamic friction. Static friction tends to be greater than dynamic friction, which is why it takes more force to get a heavy box moving along the ground compared to keep it going.
Friction, I think.
Friction
In a fluid, the force of friction tends to increase when the speed increases. The exact relationship, however, is far from simple.
Friction tends to do that.
Momentum- a moving object tends to keep moving. Friction- pushing air out of the way slows it down. Gravity- pulls it down
The friction between two stationary forces is called static friction. It is the friction that resists two objects to start moving against each other. Once in motion, the friction between two forces is called dynamic friction. Static friction tends to be greater than dynamic friction, which is why it takes more force to get a heavy box moving along the ground compared to keep it going.
Friction tends to oppose the relative motion between two surfaces in contact with each other. To every action there's always an equal but opposite reaction. So friction serves as that opposite/negative reaction or force.
Friction is a force, which (usually) tends to slow moving things down.
Friction, I think.
Friction or gravity .
friction force
It tends to lose rotational energy due to friction.
A high coefficient of friction may be caused by a rough surface. It may also be the result of surfaces sticking together, as in the case of rubber which tends to stick to certain surfaces, at least when it is dry. Lubrication - such as a thin layer of oil - tends to reduce the coefficient of friction.