A rough and uneven streambed would cause the most friction. Large rocks, boulders, or other obstacles in the streambed create turbulence and resistance to the flow of water, increasing friction. Smooth and flat streambeds, on the other hand, have less friction as water can flow more freely over them.
Friction is the force that opposes the motion of two surfaces sliding against each other. When two surfaces rub against each other, the friction between them generates heat, which can cause the objects to move. The force of friction works to slow down or stop the movement of the objects.
When solid surfaces slide over each other, the kind of friction that occurs is called sliding friction. This type of friction results from the resistance to motion between the two surfaces in contact.
Static friction is the type of friction that acts on objects that are not moving. It occurs when two surfaces are in contact but not sliding past each other.
The kind of friction that occurs when solid surfaces slide over each other is called kinetic friction. It is the resistance between the surfaces that are in motion relative to each other.
heat/thermal
A rough and uneven streambed would cause the most friction. Large rocks, boulders, or other obstacles in the streambed create turbulence and resistance to the flow of water, increasing friction. Smooth and flat streambeds, on the other hand, have less friction as water can flow more freely over them.
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static friction
Sliding Friction
Sliding Friction
heat friction
Sliding Friction
sliding friction
I think you are talking about a groove cast. Groove casts form in the bottom of a stream when transported sediment is dragged along a mud bottom.
This kind of friction is referred to as drag, or air resistance.
Sliding friction requires more force to overcome its friction.