Question 423469
Navigation. In 3 sec, Penny walks 24 ft, to the bow (front) of a tugboat. The boat is cruising at a rate of 5 ft/sec. What is Penny’s rate of travel with respect to land?
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Her speed wrt to the water is (24/3) + 5 ft/sec = 13 ft/sec
Her speed wrt to the land is 13 ft/sec ± the current, + or minus depending on the direction of the current.