A-LevelPhysicsDynamics9702/12 · May/June 2014 · Q91 Mark

A ship of mass 8.4 × 10⁷ kg is approaching a harbour with speed 16.4 m s⁻¹. By using reverse thrust it can maintain a constant total stopping force of 920 000 N. How long will it take to stop?

A15 seconds

B150 seconds

C25 minutes

D250 minutes

✓ Correct answer

C: 25 minutes

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