Math Is Fun Forum

niharika_kumar

Member

From: Numeraland

Registered: 2013-02-12

Posts: 1,062

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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Agnishom

Real Member

From: Riemann Sphere

Registered: 2011-01-29

Posts: 24,996

Website

Re: velocity

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

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'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
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Bob

Administrator

Registered: 2010-06-20

Posts: 10,623

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 (2014-05-11 19:46:42)

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niharika_kumar

Member

From: Numeraland

Registered: 2013-02-12

Posts: 1,062

Re: velocity

yes, I got it.
thanks

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friendship is tan 90°.