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Mechanics

Scorching goIITian

Joined:	28 Feb 2007
Post:	287

16 Mar 2007 23:30:15 IST

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431

wave mechanics...

Engineering Entrance , Medical Entrance , AIPMT , JEE Main , AIIMS , JEE Advanced , Physics , Mechanics

i cudn't solve this...

Comments (3)

jalanshruti

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Joined: 31 Dec 2006

Posts: 31

17 Mar 2007 07:52:28 IST

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take a component in BC. write v=sqrt(t/u)
where v- velocity of wave
t - tension in string
u - mass/length
write dx/dt integerate it for length l we get time taken to travel from c to b
do same thing for b to a with u diff
and get the ans

Prateek Agarwal

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Joined: 28 Feb 2007

Posts: 287

17 Mar 2007 19:11:38 IST

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arrey...but what will be the tension...rest all to even i know...

jalanshruti

Cool goIITian

Joined: 31 Dec 2006

Posts: 31

29 Mar 2007 07:30:32 IST

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arre yaar u can find tension by drawing free body diagram of mass of rope below component

let m be mass of string and l length

u=m/l

take a component at a distance x from free end

mass of rope below component u*x

since equilibrium

so t=mg

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