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You are a member of a geological team in
Central Africa. Your team comes upon a wide river that is flowing
east. You must determine the width of the river and the current
speed (the speed of the water relative to the earth). You have a
small boat with an outboard motor. By measuring the time it takes
to cross a pond where the water isnt flowing, you have calibrated
the throttle settings to the speed of the boat in still water. You
set the throttle so that the speed of the boat relative to the river is a
How wide is the river?
What is the
With the throttle set so that the speed of the boat relative to the water is 6.00 m/s, what is the shortest time in which you could cross the river?
Where on the far bank would you land?
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Relative Motion concept. If you need more Relative Motion practice, you can also practice Relative Motion practice problems.