s=7t^3-3t (a)Find the velocity and acceleration as functions of t. v(t)= a(t)= (b) Find the acceleration after 7 seconds. _______m/s^2 (c) Find the acceleration when the velocity is 0. (Round the answer to one decimal place) _______m/s^2
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Originally Posted by plstevens s=7t^3-3t (a)Find the velocity and acceleration as functions of t. v(t)= a(t)= (b) Find the acceleration after 7 seconds. _______m/s^2 (c) Find the acceleration when the velocity is 0. (Round the answer to one decimal place) _______m/s^2 and: RonL
so what do i do for b and c
Originally Posted by plstevens so what do i do for b and c b) You have your function for a(t) so what is a(7)? c) When is v(t) = 0? Find that value of t and then find the acceleration at that time. -Dan
i don't mean to be a dumby but i still don't get it
Originally Posted by plstevens i don't mean to be a dumby but i still don't get it If I gave you a function, for example, a(t) = 8t + 3 what would you tell me the value of a(7) is? Part b is exactly this, but of course with the function you derived in part a). -Dan
I'm so sorry but thats not making sense
Originally Posted by plstevens I'm so sorry but thats not making sense In part a) your position function is given as . From this you get that the acceleration function is What is the value of a(7), the value of the function a(t) when t = 7? If you can't answer that, then I suggest you have a long talk with your instructor. -Dan
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