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![[Post New]](/templates/default/images/icon_minipost_new.gif) 1 Apr 2008 21:47:46 IST
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Why is it difficult to walk on sand??
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1 Apr 2008 21:48:46 IST
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since the reaction force will be low so friction will be less and he will be unable to walk
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From shadows a light shall spring
Renewed shall be blade that's broken
The crown less again shall be king.
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1 Apr 2008 21:50:30 IST
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y will it b low??
does sand reduce normal force??
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1 Apr 2008 21:51:33 IST
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when we push the ground backwards, according to third law the ground pushes us forwards and this force is the frictional force. since the frictional force by the sand is too less therefore it is difficult to walk on sand.
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1 Apr 2008 21:53:36 IST
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whatever be the normal reaction, since the coefficient of friction of the sand is too low, the frictional force is too low. Remember more the surface is rough, higher is the coefficient of friction.
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1 Apr 2008 21:57:17 IST
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similar is the case with ice. it is too smooth, therfore coefficient of frictionis too low and hence the friction. it implies it is also difficult to walk on ice and it happens.
Always remember:
FRICTION IS THE NECESSARY CONDITION FOR US TO WALK
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1 Apr 2008 22:06:53 IST
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way to go sahil
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From shadows a light shall spring
Renewed shall be blade that's broken
The crown less again shall be king.
MY BLOG
http://my.opera.com/vu2rje/blog/ |
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1 Apr 2008 22:36:29 IST
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My opinion is quite diffrent
Due to less area covered ,the pressure is more .So our feet sinks into the sand and can not walk properly.
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1 Apr 2008 23:04:27 IST
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because the sand offers no friction to the feet,
therfore it is difficult to walk on sand.
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