A person holds a water balloon that contains 0.5 kg of water. He throws it upward so it is 5 meters above the ground at its highest point before descending. What is the balloon’s potential energy at that point? What is the velocity with which the balloon hits the ground? (In this case, all the potential energy is converted into kinetic energy.)
What will be an ideal response?What will be an ideal response?
PE= mgh = (0.5 kg)(9.8 m/s2) (5 m) = 24.5 J
?KE = ?PE = ½ m (v22 - v12) = 24.5 J
v = 0 (velocity when it starts to fall) v2 = 9.9 m/s
½ (0.5 kg) (v22 m2/s2) = 24.5 J
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