What is the first law of motion?

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Multiple Choice

What is the first law of motion?

Explanation:
The first law of motion describes inertia—the tendency of a body to resist changes in its motion. An object at rest stays at rest, and a moving object keeps moving in the same direction at the same speed unless a net external force acts on it. Mass is a measure of this inertia: more mass means greater resistance to changes in motion. In everyday life, friction and gravity are forces that can change motion, pulling objects to a stop or altering their speed and direction. Momentum is a related idea that describes the quantity of motion (mass times velocity), but it’s not the law itself. So the best answer is inertia, the property that explains why motion tends to continue uninterrupted unless something acts on it.

The first law of motion describes inertia—the tendency of a body to resist changes in its motion. An object at rest stays at rest, and a moving object keeps moving in the same direction at the same speed unless a net external force acts on it. Mass is a measure of this inertia: more mass means greater resistance to changes in motion.

In everyday life, friction and gravity are forces that can change motion, pulling objects to a stop or altering their speed and direction. Momentum is a related idea that describes the quantity of motion (mass times velocity), but it’s not the law itself. So the best answer is inertia, the property that explains why motion tends to continue uninterrupted unless something acts on it.

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