The force of kinetic friction is less than the force of static friction
The force of kinetic friction between two surfaces is independent of the areas in contact provided the normal reaction is unchanged
The force of rolling friction between two surfaces is less than the force of sliding friction
The angle of friction is the angle between the normal reaction and the force of friction
Friction may be reduced by lubrication
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Discussions (16)
The selected option is wrong guys the force of kinetic friction is always less than static friction
All of you that are saying the answers are incorrect pls state your choice with prove. Don't refute an answer without a reason.
The answer is wrong . the correct answer is D cuz all of them are correct except D. Firstly in application to our daily movement. We tend to move cuz the kinetic friction is less than static friction , why rolling is able to occur cuz the friction is less than sliding . that's why we tend to move fast with a roller than during slide. Please dont be confused...my school please correct that
Kinetic friction (also referred to as dynamic friction) is the force that resists the relative movement of the surfaces once they're in motion. The static friction between two surfaces is always higher than the kinetic friction (at least, in practical, real-world applications). Source: google
@Myschool please since all our valid rasons are wrong, you should provide us with your own explainations
You guys dont even give us valid reasons any more. Just a wrong answer and then you leave us to argue with ourselves.. it is no longer funny I'm sorry
All the answers are correct. Even the option D. The answer depends on the choice of the examiner. It can never be A !
Kinetic friction is also known as sliding or dynamic friction... Sliding friction is less than static friction.. Ref:new school physics pg 21..
So, D is correct
The selected answer is wrong, it should be D, the angle of friction is not the angle made by the resultant of normal reaction and limiting friction with the normal reaction
The answer should be B. It is not independent of the area of the surface in contact, it is dependent of the area in contact.
