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General Physics

New kid on the Block

 Joined: 15 May 2012 Post: 6
15 May 2012 21:22:40 IST
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8
382
Vectors (plz help
Engineering Entrance , Medical Entrance , AIPMT , JEE Main , AIIMS , JEE Advanced , Physics

a swimmer can swim in still water with speed v and the river is flowing with velocity v/2. To cross the river in shortest distance, he should swim making angle ? with upstream. What is the time taken to swim across the shortest distance ?

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 May 2012 21:27:41 IST
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angle=sin^-1(1/root5)

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 May 2012 21:28:53 IST
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ohhhhhhh with upstream 90+angle given above

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 May 2012 21:29:35 IST
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and time=2d/root(5)v

New kid on the Block

Joined: 15 May 2012
Posts: 1
15 May 2012 22:58:38 IST
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30*

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 May 2012 23:08:41 IST
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o teri ye mne kya kr dia ulta solve kr dia sory al the answer is 30

Blazing goIITian

Joined: 21 Mar 2012
Posts: 1457
15 May 2012 23:09:47 IST
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time=2d/root(3)

New kid on the Block

Joined: 15 May 2012
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16 May 2012 16:44:35 IST
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can ny1 describe it????

Cool goIITian

Joined: 26 Mar 2009
Posts: 38
18 May 2012 18:27:10 IST
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30 degree with the vertical

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