question 54 is what I am looking at! the ball\'s speed is one-half its lauhell S
ID: 1865145 • Letter: Q
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question 54 is what I am looking at!
the ball's speed is one-half its lauhell Spuou above its launch point does the ball attain? 53. ssm From her bedroom window a girl drops a water-filled balloon to the ground, 6.0 m below. If the balloon is released from rest, how long is it in the air? 54. Before working this problem, review Conceptual Example 15. A pel- let gun is fired straight downward from the edge of a cliff that is 15 m above the ground. The pellet strikes the ground with a speed of 27 m/s. How far above the cliff edge would the pellet have gone had the gun been fired straight upward? 55. n Consult Multiple-Concept Example 5 in preparation for this problem. The velocity of a diver just before hitting the water is 10.1 m/s, where the minus sign indicates that her motion is directly downward. What is her displacement duriag the last 1.20 s of the dive?Explanation / Answer
from the conservation of energy
total energy before hitting the groung = 1/2mv^2
total energy at maximum height = mgh
mgh = 1/2mv^2
h = v^2/2g
h = 27^2/2*9.8
h = 37.194 m
height from the cliff = 37.194-15
H = 22.194 m
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