Momentum is defined as which of the following?

Master the Navigation, Seamanship, and Shiphandling (NSS) – Officer of the Deck (OOD) Phase 2 Exam with engaging flashcards and multiple choice questions, complete with hints and explanations. Prepare comprehensively for your test!

Multiple Choice

Momentum is defined as which of the following?

Momentum describes how much motion an object has, and it depends on both how much matter there is and how fast it’s moving. It is defined as the product of mass and velocity: p = m v. Because velocity has both speed and direction, momentum is a vector. That means momentum is not just mass in motion, nor is it energy. It’s not the rate of change of velocity (which is acceleration), and it’s not a force. Force relates to how momentum changes over time (F = dp/dt). It’s the combination of mass and velocity—how heavy something is and how fast it’s going in a given direction. In ship handling, this matters because the larger the mass and the higher the speed, the greater the momentum and thus the greater the effect of any external impulse (like engine thrust, prop wash, or a hull collision). Momentum explains why stopping distance increases with speed and why turning or stopping requires applying sufficient impulse to overcome the ship’s momentum.

Momentum describes how much motion an object has, and it depends on both how much matter there is and how fast it’s moving. It is defined as the product of mass and velocity: p = m v. Because velocity has both speed and direction, momentum is a vector.

That means momentum is not just mass in motion, nor is it energy. It’s not the rate of change of velocity (which is acceleration), and it’s not a force. Force relates to how momentum changes over time (F = dp/dt). It’s the combination of mass and velocity—how heavy something is and how fast it’s going in a given direction.

In ship handling, this matters because the larger the mass and the higher the speed, the greater the momentum and thus the greater the effect of any external impulse (like engine thrust, prop wash, or a hull collision). Momentum explains why stopping distance increases with speed and why turning or stopping requires applying sufficient impulse to overcome the ship’s momentum.

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