Question

N.

Answer 1

you need to substitute h0 = 400 and h = 0... (the car has hit the ground which will give

\[0 = -16t^2 + 400\]

now just solve for t

and only use the positive value as time can't be negative.

hope this helps

Answer 2

I tried solving it for t but I'm doing it incorrectly..

Answer 3

or maybe I'm just doing it the wrong way.

Answer 4

ok.. so rewrite the equation


\[16t^2 = 400\]

divide both sides by 16

then take the square root of the answer..

Answer 5

Oh, I was adding 16 on both sides... my mistake... ty