5. A naughty little boy is dropping water balloons from the roof of a building 20 m tall. His technique is to drop one, wait one second, and the throw another down so that the two balloons hit their target at the same time. a)Determine the travel time for each balloon b)What should be the velocity of the second balloon? c) With what velocity does each balloon hit the target?

 Isolate the givens
Balloon #1

vo = 0
x = -20m
a = g = -9.8 m/s^2

Balloon #2

a = g= -9.8m/s^2
t2 = t1 - 1 s
x = - 20 m

Balloon #1

Therefore balloon #2..time = 1.02 s

 
     This problem represents a race wherein one party gives the other party a head start and subsequently catches him (her, it). Because each object will have the same acceleration once each has started, it must be the case that balloon #2 is traveling faster at its launch moment than balloon #1 is traveling one second after its launch moment..