A ball is launched directly upward from ground level with aninitial speed of 19

Question

A ball is launched directly upward from ground level with aninitial speed of 19 m/s. (Air resistance isnegligible.)
(a) How long is the ball in the air? .......s
(b) What is the greatest height reached by theball? ....... m
(c) How many seconds after launch is the ball 8 m above therelease point? ......... s after being thrown (first time) ..........s after being thrown (second time)
A ball is launched directly upward from ground level with aninitial speed of 19 m/s. (Air resistance isnegligible.)
(a) How long is the ball in the air? .......s
(b) What is the greatest height reached by theball? ....... m
(c) How many seconds after launch is the ball 8 m above therelease point? ......... s after being thrown (first time) ..........s after being thrown (second time)

Explanation / Answer

speed v = 19 m / s (a). time = 2 v / g               = 3.877 s (b). Height H = v ^ 2 / 2g                      = 18.41 m

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