IAC White Set Science Bee Practice Test

What property describes an object's resistance to a change in its motion?

Friction Gravity Momentum Inertia

Correct Answer:

Inertia

Explanation:

Inertia is the property that describes an object's resistance to a change in its motion. This means a heavier object, with more mass, resists changes in speed or direction more than a lighter one. According to Newton's first law, without a net external force, an object at rest stays at rest and an object in motion keeps moving in a straight line at the same speed. Mass measures how much inertia something has. Friction is a force that opposes motion, gravity is a force pulling toward Earth, and momentum is the quantity of motion (mass times velocity) that changes when a net force acts. A good way to picture inertia is to imagine pushing a heavy cart versus a light bicycle—the heavy cart resists starting and stopping more because it has greater inertia.

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