Question 693681: I have a question regarding Applications with motion. The motion formula d=rt
Word problems, I HATE word problems and am so confused how to set up this problem~
A private airplane leaves an airport and flies due south at 192 mph. Two hours later a jet leaves the same airport and flies due south at 960 mph. When will the jet overtake the plane?
Answer by ankor@dixie-net.com(22740)   (Show Source):
You can put this solution on YOUR website! A private airplane leaves an airport and flies due south at 192 mph.
Two hours later a jet leaves the same airport and flies due south at 960 mph.
When will the jet overtake the plane?
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You know the distance formula, just read it carefully and THINK!
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A good fact to keep in mind is:
When the jet overtakes the small plane, they will have traveled the same distance;
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Let t = flying time of small plane
The large plane started 2 hrs later, therefore
(t-2) = flying time of jet
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Write a distance equation
jet dist = small plane dist
960(t-2) = 192t
960t - 1920 = 192t
960t - 192t = 1920
768t = 1920
t = 1920/768
t = 2.5 hrs after the small plane departs, the jet overtakes it
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We can prove that to ourselves, find the distance each plane flew
the jet travel time; 2.5 - 2 = .5hr
a distance equation for each plane
.5(960) = 480 mi
2.5(192) = 480 mi also
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Did this help? You know much of life involves solving word problems. Not always with numbers, but deciphering what people say to you, is like solving a word problem. It is worth your time to practice and learn how to do them. A lot people on this forum can help you do that.
Merry Christmas!, Carl
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