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![[Post New]](/templates/default/images/icon_minipost_new.gif) 18 Jun 2007 15:54:09 IST
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When a person walks on a rough surface thenthe frictional force exerted by the surface in which direction . please explain briefly
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18 Jun 2007 16:09:07 IST
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The direction of frictional force acting on a body is always opposite to the direction of the motion of the body ... e.g. - If the body moves 2 right den the direction of friction acting on it will be 2 da left. Hope u have got it. Rate me .... :)
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18 Jun 2007 16:39:00 IST
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Hey vinkymarali
you are wrong somewhere
I fhe has asked u that explain him then
He means to say that give him information in detail
See Ankit
In case of motion of a body linearly
the friction force acts in the direction opposite to that of the motion
as it gives resistance to the motion of the body
Anything that gives resistance acts in the opposite of the positive
Force.
Thus well undrstood
We can say that friction force follows the
Newton's third law of motion
" Every force of action has an equal and oppposite force of reaction"
Hope u understood the concept i am trying to explain
If yes plZ rate me for my efforts.
Cheers !!!!@@@!!!!!!!!!!!!!!!!!!!
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Always available for help !
But Remember Don't hesitate to ask a good Question but
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18 Jun 2007 19:00:05 IST
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Sorry I by mistake explained in what direction the frictional force acts as I did not read ur Question properly When a person walks on the road the friction force acts in the direction opposite to the direction of motion of the Man .
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Always available for help !
But Remember Don't hesitate to ask a good Question but
Be damn serious for Questioning a weak one.
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18 Jun 2007 21:00:53 IST
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well I have got a question here..........
that why are we not counting the angle that man's foot makes while walking and then calculate the remaining parameters........
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18 Jun 2007 21:24:27 IST
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The horizontal component of the reaction of the force exerted on the ground takes a person forward while walking. So frictional force is opposite to this component of force. In the figure Fcos  is the component of F which takes the man forward. So frictional force is opposite to this Fcos ... Rate me please...
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salman khan |
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18 Jun 2007 21:25:42 IST
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I AGREEE.................
GUD WRK BIKI...........
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There's Light at the end of every Tunnel, so KEEP MOVING....
Best of luck to all my mates....
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18 Jun 2007 21:46:18 IST
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excellent work biki!!!!!!
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RATE ME FOR MY EFFORTS....... |
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18 Jun 2007 21:49:55 IST
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see the direction of friction always acts opposite to the relative motion between the point of contact and the surface.For instance consider a body placed over the other and a force is applied to the lower mass the direction of friction on the upper mass will be in the backward direction whereas in case of a body rolling over the other friction on the upper mass will act in forward dir
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19 Jun 2007 12:41:28 IST
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look wat i know of friction force is: if a body in motion dosent slip ie. on rough surface it has d friction force in opp. direction of d motion of d body while in case of a slipping surface friction force is in direction of motion of body eg. a boll climbing on inclined smooth surface for better understanding u may consult any good physics teacher so, as in ur question man walks on a rough st. surface its defineately having friction force in opp. directinn of his walking bcoz if friction force is in same direction he will fall & i would conclude that its a smooth surface i think i have done me job bye have a nice day
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24 Jun 2007 07:10:31 IST
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r u sure ?
Is not the || component of contact force is friction ?
From the figure Fcos  acts in the forward direction ?
And is not it a fact that friction is sometimes also the cause of motion ?
Here Fcos  acts in the forward direction.
So ?
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it is not important where u stand, but in which direction u are moving |
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