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27 Nov 2019
A small boat is headed for a harbor 31 km directly northwest of itscurrent position when it is suddenly engulfed in heavy fog. Thecaptain maintains a compass bearing of northwest and a speed of10.1 km/h relative to the water. The fog lifts 3.0 h later and thecaptain notes that he is now exactly 3.9 km south of theharbor.
(a) What was the average speed of the current during those 3.0h?
(b) In what direction should the boat have been heading to reachits destination along a straight course?
the answer is an angle west of north
(c) What would its travel time have been if it had followed astraight course?
A small boat is headed for a harbor 31 km directly northwest of itscurrent position when it is suddenly engulfed in heavy fog. Thecaptain maintains a compass bearing of northwest and a speed of10.1 km/h relative to the water. The fog lifts 3.0 h later and thecaptain notes that he is now exactly 3.9 km south of theharbor.
(a) What was the average speed of the current during those 3.0h?
(b) In what direction should the boat have been heading to reachits destination along a straight course?
the answer is an angle west of north
(c) What would its travel time have been if it had followed astraight course?
Hubert KochLv2
18 Sep 2019
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