Asked by yach
Find the position function s(t) given acceleration a(t)=3t if v(2)=0 and s(2)=1.
Answers
Answered by
Reiny
a(t) = 3t
v(t) = (3/2)t^2 + c
v(2) = 0 ----> 0 = (3/2)(4) + c
0 = 6 + c
c = -6
v(t) = (3/2)t^2 - 6
s(t) = (1/2)t^3 - 6t + k
s(2) = 1 -----> 1 = 4 - 12 + k
k = 9
s(t) = (1/2)t^3 - 6t + 9
v(t) = (3/2)t^2 + c
v(2) = 0 ----> 0 = (3/2)(4) + c
0 = 6 + c
c = -6
v(t) = (3/2)t^2 - 6
s(t) = (1/2)t^3 - 6t + k
s(2) = 1 -----> 1 = 4 - 12 + k
k = 9
s(t) = (1/2)t^3 - 6t + 9