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Cool goIITian

Joined:	24 Mar 2009
Post:	34

25 Mar 2009 17:16:11 IST

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If i have a block and i pull it with a velocty ' v ' and the block is attached to a string which ma

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If i have a block and i pull it with a velocty ' v ' and the block is attached to a string which makes an angle @ with the direction of velocity of block then what is the velocity of the string?

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Krishna Gopal Singh

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Joined: 29 Dec 2006

Posts: 5535

25 Mar 2009 21:48:27 IST

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There are two components of v. vcos(theta) along string and vsin(theta).Only the component along string will pull string, So velocity of string is vcos(theta)

snail

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Joined: 20 Apr 2008

Posts: 195

25 Mar 2009 22:37:43 IST

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Can the velocity of the string and the block be different? Then there will be a slip or break of string. I feel it has to be same as that of block for continuity of the act of pulling.

Ofcourse the tension in the string can be resolved. Horizontal component will help in pulling while vertical component may help in reducing friction. But velocity should remain same , I feel.

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