Which quantity resists change in motion?

Prepare for the GMAS Physical Science Test. Study with flashcards and multiple-choice questions, each question has hints and explanations. Master your knowledge and excel in your exam!

Multiple Choice

Which quantity resists change in motion?

Explanation:
Inertia is the resistance to a change in motion. It explains why an object tends to keep moving in a straight line at constant speed or stay at rest unless a net external force acts on it. The heavier the object, the greater its inertia, so it resists changes in motion more and requires a larger force to achieve the same acceleration. Mass is the quantitative measure of this resistance—more mass means more inertia. So the quantity that resists changes in motion is inertia.

Inertia is the resistance to a change in motion. It explains why an object tends to keep moving in a straight line at constant speed or stay at rest unless a net external force acts on it. The heavier the object, the greater its inertia, so it resists changes in motion more and requires a larger force to achieve the same acceleration. Mass is the quantitative measure of this resistance—more mass means more inertia. So the quantity that resists changes in motion is inertia.

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