You drop a water balloon straight down from your dormitory window 80.0 m above your friend’s head. At 2.00 s alter you drop the balloon, not realizing it has water in it your friend fires a dart from a gun, which is at the same height as his head, directly upward toward the balloon with an initial velocity of 20.0 m/s.
a) How long after you drop the balloon will the dart burst the balloon?
b) How long after the dart hits the balloon will your friend have to move out of the way of the falling water? Assume the balloon breaks instantaneously at the touch of the dart.
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