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
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
In part a) your position function is given as $\displaystyle s(t) = 7t^3 - 3t$. From this you get that the acceleration function is
$\displaystyle a(t) = 42t$
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