Answer:
Step-by-step explanation:
Take the derivative of position to get velocity.
= v(t) = 75 -
Find when the velocity equals 0.
0 = 75 -
-75 = -
25 =

t = ± 5 seconds
Now find the acceleration at t = 5 seconds. Because time cannot be negative, disregard the -5 second answer.
Take the derivative of velocity to get acceleration
a =

Now plug in 5
a = -6*5
a = -30
