Question

Which equation would best help solve the following problem?

Maria releases a javelin 1.5 meters above the ground with an initial vertical velocity of 22 meters per second. How long will it take the javelin to hit the ground?


–4.9t^2 + 22t + 1.5 = 0

–4.9t^2 + 22t = 1.5

–4.9t^2 + 1.5t + 22 = 0

–16t^2+ 22t + 1.5 = 0

Answer 1

h(t) = ho +Vo.t - (g*t^2)/2

h(t) = 1.5 + 22t -4.9t^2

h(t) = 0 ⇒ -4.9t^2 + 22t + 1.5 =0. This is the first option.