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MathGroup Archive 2001

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Re: Deriviation d/dt(x(t))

  • To: mathgroup at smc.vnet.net
  • Subject: [mg27451] Re: Deriviation d/dt(x(t))
  • From: dennisw555 at aol.com (DennisW555)
  • Date: Sun, 25 Feb 2001 20:55:57 -0500 (EST)
  • References: <97a6up$akb@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

>I have a problem, having a definition of a circle: x^2+y^2=r^2
>Where x and y are functions of the time:  x(t), y(t) and r ist a constant.
>
>Now I want to deriviate the equation to get the velocity vector.
>It should be : 2 x dx/dt +2 y dy/dt = 0

The velocity vector is simply {dx/dt, dydt}


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