Motion of a particle

  • #1

Homework Statement


11.8 The motion of a particle is defined by the relation ##x=t^3 - 6t^2 - 36t - 40,
where x and t are expressed in feet and seconds, respectively. Determine
(a) when the velocity is zero, (b) the velocity, the acceleration, and the total
distance traveled when x = 0.

Homework Equations




The Attempt at a Solution



Vector Mechanics Dynamics Beer P11_8 s.jpg

[/B]
Can you check my solution?
 

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Answers and Replies

  • #2
TSny
Homework Helper
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It all looks correct to me. I'm not sure why you found the time when ##a = 0## or the position at that time.
 
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