Air Resistance: a Ship Is Being Pulled Through a Harbor

question 111

Multiple Choice

Air resistance: A ship is being pulled through a harbor at constant velocity by two tugboats as shown in the figure. The lines attached to the two tugboats have the same tension of 200,000 N. Each line makes an angle of 28.0° with the direction the ship is being towed. What is the magnitude of the drag force due to the water on the ship?

• A) 177 × 10⁵ N
• B) 1.88 × 10⁵ N
• C) 93.9 × 10⁴ N
• D) zero
• E) 3.53 × 10⁵ N

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