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Classical Mechanics

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Moderate

Net Speed of a Cruise Ship in the Gulf Stream

CLMECH-OQYMEV

Cruise ships go about 21 knots (10.8 m/s) through the water. The gulf stream flows at about 3.5 knots (1.8 m/s).

If a cruise ship is traveling southeast (heading 135° from North) in a region where the gulf stream flows to the East (heading 90°), how fast will the ship travel relative to a stationary observer?

A

9 m/s

B

11 m/s

C

12 m/s

D

13 m/s