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physicsidiot1
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Homework Statement
If a curve has the property that the position vector r(t) is always perpendicular to the tangent vector r'(t), show that the curve lies on a sphere with center the origin.
Homework Equations
-1/r'(t)= slope of position vector
x[tex]^{2}[/tex]+y[tex]^{2}[/tex]=1
The Attempt at a Solution
Not really sure where to begin for this one.