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![[Post New]](/templates/default/images/icon_minipost_new.gif) 10 Jan 2008 10:40:14 IST
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a uniform disc is undergoing pure rolling...now tell me how many such points r der on the disc whose speed{not velocity} is equal to that of the centre of mass??
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10 Jan 2008 13:50:35 IST
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centre of mass does not have speed nor velocity(it has no motion)
hence there are no points having same speed
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SHREYA |
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10 Jan 2008 14:39:38 IST
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i think centre of mass has constant speed....
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10 Jan 2008 14:40:22 IST
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all points on the rigid body have one of their velocity components which is same as that of COM (magnitude and direction). but they have angular velocity r  also. so for the points to have velocity equal to the COM's, r=0, that means it is the COM itself. so there are no other points other than COM having same velocity as COM. |
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10 Jan 2008 14:40:42 IST
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in pure rolling centre of mass has linear velocity......
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