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## #1 2014-05-11 16:50:19

niharika_kumar
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From: Numeraland
Registered: 2013-02-12
Posts: 1,059

### velocity

a particle is moving on a circular path with constant speed v.Find the change in velocity when it moves through 120°?

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## #2 2014-05-11 17:43:26

Agnishom
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From: Riemann Sphere
Registered: 2011-01-29
Posts: 22,018
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### Re: velocity

Change in velocity? Do you mean instantenous acceleration or average?

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## #3 2014-05-11 19:45:03

bob bundy
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Registered: 2010-06-20
Posts: 7,198

### Re: velocity

hi Niharika

Diagram below.  What is not clear to me is how you are supposed to express this.  (in terms of what coordinate system).

If I had this problem and no more information I would call the original vector V1 =  v.i   where i is a unit vector in that direction.  Then find V2 in terms of i and j.

Bob

ps.  Looking again at the diagram, it would probably have been better if I had put V1 going the other way so it is positive i, but too late.  I'm sure you can re-jig it yourself.

Last edited by bob bundy (2014-05-11 19:46:42)

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## #4 2014-05-12 18:38:30

niharika_kumar
Member
From: Numeraland
Registered: 2013-02-12
Posts: 1,059

### Re: velocity

yes, I got it.
thanks

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