Physics
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chetana
Oct 6, 2010, 9:28:49 AM10/6/10
to Byjus_cet_1st_yr_class
Sir,
Why is static friction greater than kinetic friction?
Why is static friction greater than kinetic friction?
Arjun Mohan
Oct 6, 2010, 11:09:49 AM10/6/10
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Hi Chetana,
The origin of frictional force is due to the intermolecular bonds between the body in motion and the surface on which it moves. Basically due to the normal reaction of the body and the surface on which it rests, both the surfaces get cold welded with each other resulting in creation of friction. When a body is at rest, the amount the force required to break this cold welding is the largest and is given by static friction. While in motion, the cold welded bonds required to be broken comes down greatly because the motion does not allow a lot of them to come into existence. As a result, the dynamic friction is lesser than the static value.
Hope that clears the doubt
Regards,
Arjun
--
If ignorance is bliss,why do we seek knowledge?
The origin of frictional force is due to the intermolecular bonds between the body in motion and the surface on which it moves. Basically due to the normal reaction of the body and the surface on which it rests, both the surfaces get cold welded with each other resulting in creation of friction. When a body is at rest, the amount the force required to break this cold welding is the largest and is given by static friction. While in motion, the cold welded bonds required to be broken comes down greatly because the motion does not allow a lot of them to come into existence. As a result, the dynamic friction is lesser than the static value.
Hope that clears the doubt
Regards,
Arjun
On Wed, Oct 6, 2010 at 6:58 PM, chetana <chet...@gmail.com> wrote:
Sir,
Why is static friction greater than kinetic friction?
If ignorance is bliss,why do we seek knowledge?
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