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![[Post New]](/templates/default/images/icon_minipost_new.gif) 26 Oct 2007 14:47:13 IST
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Does friction always oppose the motion of the body? If not please give the examples of the situations where friction causes the motion i.e, friction is in the direction of motion.
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God has given you one face, and you
make yourself another.
~William Shakespeare
You were born an original. Don't die a copy.
~John Mason |
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26 Oct 2007 15:15:39 IST
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friction opposes relative motion between two bodies & not motion of the body for eg: when one block is kept on another block & the upper block is given some velocity then lower block moves due to friction
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"Imagination is more important than knowledge."
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see the figure...............
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salman khan |
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26 Oct 2007 16:49:05 IST
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Yes it causes the relative motion between the surfaces and not the motion of any body. The diagram given by biki is sufficient to explain your answer.
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Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur
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27 Oct 2007 17:12:56 IST
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Friction only opposes relative motion between bodies.
Example of a case where friction is in direction of motion is WALKING.
While walking, we move forward, but our foot pushes backward and to prevent the foot from slipping back, friction acts in the forward direction, which is, the direction of our motion.
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27 Oct 2007 22:53:23 IST
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no my dear friction does not opposes motion always some time it support it .for eg. any vehicle runs only when frictional force gives it a reaction force
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