The physical size is unimportant - you can have a huge object that weighs less than a small one. The heavier the object is - the greater the friction.
by increasing the roughness of the ground or increasing the sole of the shoes
The amount of friction between two surfaces depends on more than two things. It could depend on many things like The shared surafce area The amount of force between the objects How rough or somooth the surfaces are The presence of a lubricant or glue Ball bearings Even temperature. Many things affect the amount of friction between things
coefficientThe amount of friction divided by the weight of an object forms a dimensionless number called the coefficient of friction.
The force of friction between two objects is the product of the normal force and the coefficient of friction. The normal force is the component of force that is perpendicular to the plane of friction. For example, if you are pushing on a block of wood on the floor with a force F at an angle of 30 degrees above the horizontal, then the normal force N = F sin 30. The coefficient of friction is specific to the two materials, in this example the block of wood and the floor. In addition, there is a static coefficient of friction (applicable to a stationary situation) and a kinetic coefficient of friction (applicable when the object is already moving).
Most competitive swimmers will shave all body hair except the hair on their heads to lessen the amount of friction between themselves and the water. They also might wear a swimsuit that reflects water instead of soaking it up.
Because the size is a kintec force on it
The more uneven the surface, the more friction there is.
There is really nothing unusual here, but some people may be surprised when they first find out that the amount of friction between two surfaces doesn't depend on the surface area.
Friction= Normal force* Coefficient of friction
Friction= Normal force* Coefficient of friction
Mass.
Yes, clay does have more friction than sandpaper. This is because, clay is a much heavier object/material then sandpaper, therefore if you were to drag a lump of clay on the floor and measured the friction, it would be higher then the amount of friction caused by sandpaper. If the amount of force needed to pull the clay is larger then the amount of force needed to pull the sandpaper, that means that there is a much larger amount of friction present, because the more friction there is present, the harder you would need to pull. Hope this helps.
Yes. Double the weight and double the friction.
Rough surfaces, the rougher the surface, the greater the friction.
it the amount of stickiness between two objects that are not moving
by increasing the roughness of the ground or increasing the sole of the shoes
the terminal amount of friction possibly produced between two interacting inanimate objects. this is where we get brake horsepower from.