Height ler second of a ball

Question

S(t) = 16 t 2 exp +128 t + 4.maximum height per second and what will the max height be 

Answer 1

If up is positive and down is negative, the correct equation is

 

s(t) = -16t² + 128t + 4

 

[The minus sign is missing in the first term of the given equation.]

 

Maximum height occurs at the vertex of the height-vs.-time parabola, which is at

 

t = -128/[2(-16)] sec = ? sec

 

Now plug the result for t into s(t) to get maximum height.  You should be able to finish from here.