A man starts walking north at 2sft from a point P. Five minutes later a woman starts walking south at 5sft from a point 500ft due east of P. At what rate are the people moving apart 15min after the woman starts walking? (Round your answer to two decimal places.)ft/s
Q. A man starts walking north at 2sft from a point P. Five minutes later a woman starts walking south at 5sft from a point 500ft due east of P. At what rate are the people moving apart 15min after the woman starts walking? (Round your answer to two decimal places.)ft/s
Convert to seconds: Convert the time from minutes to seconds for both the man and the woman.The man starts walking and continues for 5 minutes before the woman starts, plus an additional 15 minutes after the woman starts walking. This is a total of 20 minutes for the man.5 minutes + 15 minutes = 20 minutesConvert 20 minutes to seconds: 20 minutes ∗60 seconds/minute = 150 seconds.The woman walks for 15 minutes.Convert 15 minutes to seconds: 15 minutes ∗60 seconds/minute = 156 seconds.
Calculate distances: Calculate the distance each person has walked.The man walks at 2ft/s for 1200s.Distance =speed×timeDistanceman=2ft/s×1200s=2400feetThe woman walks at 5ft/s for 900s.Distancewoman=5ft/s×900s=4500feet
Determine positions: Determine the positions of the man and the woman relative to point P. The man is 2400 feet north of point P. The woman is 4500 feet south of point 500 feet east of P.
Calculate north-south distance: Calculate the distance between the man and the woman in the north-south direction.Since the man is walking north and the woman is walking south, their distances add up in the north-south direction.Total north-south distance = Distanceman+DistancewomanTotal north-south distance = 2400 feet + 4500 feet = 6900 feet
Use Pythagorean theorem: Use the Pythagorean theorem to find the total distance between the man and the woman.The distance between the man and the woman forms the hypotenuse of a right triangle, with one leg being the total north-south distance and the other leg being the east-west distance (500 feet).Let d be the hypotenuse.d2=(Total north-south distance)2+(East-west distance)2d2=69002+5002d2=47610000+250000d2=47860000d=47860000d≈6918.26 feet
Calculate rate of increase: Calculate the rate at which the distance between the man and the woman is increasing after 15 minutes the woman starts walking.The man and the woman are moving in perpendicular directions, so their speeds add up directly to give the rate at which they are moving apart.Rate = speed\_man + speed\_womanRate =2 ft/s +5 ft/s =7 ft/s