When photons move in the vacuum.
Yes friction can be reduced.Merely by using a surface type which is much smoother.Therefore the friction will be largely reduced.However it can never be diminished as it will be ever present.
yes. to have friction you need more movement between what ever is making the friction which then brings you more work
Rubber has more friction than an ice cube. Ice has almost no friction what so ever.
Normally you can't stop friction alltogether, but water can certainly reduce friction considerably. Did you ever slip on a wet floor? This is because the friction is much less than usual.
yes. because of friction and gravity
no
Yes friction can be reduced.Merely by using a surface type which is much smoother.Therefore the friction will be largely reduced.However it can never be diminished as it will be ever present.
Heat
yes. to have friction you need more movement between what ever is making the friction which then brings you more work
Rubber has more friction than an ice cube. Ice has almost no friction what so ever.
Normally you can't stop friction alltogether, but water can certainly reduce friction considerably. Did you ever slip on a wet floor? This is because the friction is much less than usual.
yes. because of friction and gravity
Friction makes the graphite or ink come off of what ever you are writing with and goes on the paper
my dear gravity is forever greater than friction and strong atomic force is greater than gravity
Friction is not useful when ever we do not want it. Examples would be when two materials are rubbing against one another. The friction of ropes in pulleys eventually causes wear on both; friction of shoes or straps against the body causes blisters; friction airplanes travelling through the air - friction causes the plane to get hot; the moving parts of an engine get hot from friction...
Friction is in the contact made by the water and what ever it makes physical contact with. Gravity causes the direction in which the water slides.
Answerit keeps you from slipping and falling on your butt.AnswerHave you ever tried to walk on ice? Having no friction would be like that but worse, much worse.