Multiple choice

Which type of force is exerted by the water when a ship moves through it?

  1. Frictional force

  2. Gravitational force

  3. Magnetic force

  4. Molecular force

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A Correct answer
Explanation

When a ship moves through water, it experiences fluid friction (drag) exerted by the water opposing its motion. Gravitational force pulls downward, magnetic force requires magnetic materials, and molecular force acts at atomic scales - none of these are relevant to a ship's water resistance.