Derivative Question: Finding Velocity of a Pie in Motion

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Homework Statement


Suppose the x coordinate of a pie is given as a function of time t by
x(t) = (u^2)(t^2) + 3ut,
where u is independent of t. Calculate (dx/dt) and (dx/du). Also, whihc one of the above derivatives (if either) give you vx, the x component of the pie's velocity?


Homework Equations


Just derivative rules.


The Attempt at a Solution



(dx/dt)= 2(u^2)t + 3u

(dx/du)=2u(t^2) + 3t

Since t represents tiem in this function, to obtain the velocity you must use (dx/dt).

Please let me know if this is correct or if I am missing a step.
 
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I don't understand why my problem has not been answered yet while others after me have . . I have given you all the required information. Please let me know anything else you may need. Thanks.
 
No particular reason why one question will be answered and another will not. You cannot, in general, expect a question to be answer in a few minutes or even a few hours. People don't sit around waiting for questions!

It looks to me like you answers are correct.
 
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