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A ardius vector of point A relative to t...

A ardius vector of point A relative to the origin varies with time t as `vec(r)= at hat(j)-bt^(2) hat(j)` where a and b are constants. Find the equation of point's trajectory.

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The correct Answer is:
`y=(-b)/a^(2) x^(2)`
`x=at, y=-bt^(2)=-b(x/a)^(2)`
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