A dart is being thrown at a board that is 3.40 m away. When it hits the board it is 0.784 m below the point where it was aimed and it was thrown at 8.50 m/s. How long was the dart in the air?

Answer 1

d = 0.5g*t^2 = 0.784.
4.9*t^2 = 0.784,
t = 0.4 s. = Time in air.