A signal flare is fired upward from the ground with an initial speed of 245 m/s. A stationary balloonist at a height of 1960 m sees the flare pass on the way up. a) How long after will the flare pass the balloonist again on the way down? b) After how many seconds did it reach its maximum height? c) After how many seconds will it land?
(The formula to calculate the height of a vertical projectile (in meters) is h=-4.9t2+v0t+h0, where h is the height,, v0 is the initial speed, h0is the initial height, and t is the time)
