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## Homework Statement

r(t)=(5.00t

^{2}x + 12.5t

^{3}y meters

The position r of a 12.0 kg mass, moving in the x-y plane

## Homework Equations

Third derivative....

sqrt(x

^{2}+y

^{2})

## The Attempt at a Solution

Is it correct to just take the third derivative and plug in 12 kg and find the magnitude and that would be a jerk?