FACTOID # 45: American adults have spent more time than anyone in education .
 
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Encyclopedia > Contact area

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We know that from formula F = μR

 where F : Frictional force μ : coefficient of friction R : normal force as we see in formula that no where term contact area is come

so we can say that frictional force is not depend on contact area.Don't confuse with friction clutch bcoz there we apply pressure , and more the contact area then more will be the normal force as ,force = pressre * area .we can understand this by taking two block one is Fe and other is Al and both have same weight so difinately size of aluminium block will be more , i.e. is contact area of aluminium is more .If we keep both block on same surface and pull with same angle then friction force will be same in both case . and in both case normal force is same .

 hence it is prove that frictinal force is not depend on contact area..

  Results from FactBites:
 
Contact Us (252 words)
All customers needing support are required to post a support ticket from the client area.
All support enquiries should be posted through our client area as a support ticket.
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The Joint-Contact Area of the Ankle. The Contribution of the - Wheeless' Textbook of Orthopaedics (311 words)
conditions to determine the effect of increasing the size of the posterior malleolar fracture on the contact area of the ankle joint and on the distribution of joint pressure.
The surface area of contact decreased with increased size of the posterior malleolar fragment.
The maximum loss of contact area was 35 per cent for specimens with one-half-size fractures that were tested in the neutral position.
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