Question

David kicks a soccer ball off the ground and in the air with an initial velocity of 35 feet per second. Using the formula H(t) = -16t2 + vt + s, what is the maximum height the soccer ball reaches?

17.9 feet

18.2 feet

18.7 feet

19.1 feet

I believe it is C

Answer 1

@greenlegodude57

Answer 2

H(t)= -16t2 + vt + s
initially s=0 because the ball was in the ground
H'(t)=-32t+35
H'(t)=0
t=35/32=1.09375
so
H(1.09375)=-16(1.09375)²+35(1.09375)=19.1
so it's D
hope it helps:)

Answer 3

oh thank you, I got confused when it had s because i didn't know what it would be

Answer 4

^_^

Answer 5

V = 35
S = 0

Answer 6

@sidsiddhartha Got it right, usually when it doesn't tell you what 's' is it's almost always a 0.

Answer 7

yeah @greenlegodude57 :)