can anybody help me on my calc problem? i don't quite understand it.

The position of a particle at time t sec is s=t^3-6t^2+9t. find the particles acceleration each time the velocity is zero.

thank you.

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- March 21st 2010, 11:15 AMFinalFantasy9291position, acceleration, velocity
can anybody help me on my calc problem? i don't quite understand it.

The position of a particle at time t sec is s=t^3-6t^2+9t. find the particles acceleration each time the velocity is zero.

thank you. - March 21st 2010, 11:52 AMskeeter
- March 21st 2010, 01:24 PMFinalFantasy9291
could you start the problem out for me? i still don't really know how to start.

- March 21st 2010, 01:29 PMskeeter
- March 21st 2010, 01:45 PMFinalFantasy9291
ooh! okay. well i took the derivative of s(t) and then i took the double derivative.

the double is 6t-12 right?

and then i set s'(t) to 0 so i got t=3 and t=1

then i pluged them both into a(t) and got 6 and -6.

did i do it right? :D - March 21st 2010, 01:57 PMskeeter