Posted by **MARÝA** on Friday, February 24, 2012 at 1:18pm.

The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the positive x-direction?

- PHYSï¿½CS -
**bobpursley**, Friday, February 24, 2012 at 3:14pm
take the derivative of position to get speed. Then take the derivative of speed, set to zero, and find t for the max speed. Then put that t into the position equation.

- PHYSÝCS -
**MARÝA**, Friday, February 24, 2012 at 3:22pm
ý dont know how to do it. ý need only answer... no more...

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