Wednesday, 5 March 2014

CONSTRAINTS EQUATIONS





11 comments:

  1. This comment has been removed by the author.

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  2. sir why do we take submission T.a=0?

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  3. Genius technique I have read arihant in that constraint relation is found by comparing lengths it consumes time this is excellent trick have u discivered it on ur own

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  4. T.s that is work done by tension.
    Since the string is inextensible , we can say that the work done by all the parts of tension should be 0.
    therfore T.s = 0 , on differentiating w.r.t time
    T.v = 0 , again on differentiating w.r.t time
    T.a = 0. quick and efficient.

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  5. Sir why we took a1 & a2 in upward direction.. In example 5 same as in example 2 v2 in downwards...?

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    1. a1/a2 and v1/v2 can be taken in any direction you wish.....you must only be careful to mark direction of tension(T) correctly and make sure you take product as Ta (if T and a are parallel) or -Ta (if antiparallel) or Ta*cosB (where B is angle between T and a)

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  6. Is there any exception where this rule does not work

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    1. It doesnt work when the angle of strings wrt each other changes as the value of tension chnages. This is called principle of virtual work

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