1. A car is driving toward a building at 9.00 m p h . On the roof of the car, an
ID: 2277761 • Letter: 1
Question
1. A car is driving toward a building at 9.00mph . On the roof of the car, an insect is scurrying away from the building at 15.0mph relative to the car's roof.
2. Your boat departs from the bank of a river that has a swift current parallel to its banks.
If you want to cross this river in the shortest amount of time, you should direct your boat:
a. perpendicular to the current. b. upstreamc. downstream
d. so that it drifts with the current.
3. An airplane whose air speed is 600 mi/h is flying perpendicular to a jet stream whose speed relative to the earth
Explanation / Answer
1. insect's speed with respect to ground = 15 - 9 = 6.0 mph
2.perpendicular to the current.
because it won't affect your speed perpendicular to the current,which is also straight towards the other bank
3.the speed relative to the earth will be more because it is bieng drifted by the stream which adds to its speed.
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