Which law is commonly referred to as the Law of Inertia?

Which law is commonly referred to as the Law of Inertia?

• A. Law of Gravity
• B. Law of Inertia
• C. Law of Thermodynamics
• D. Hooke's Law

Answer: (B)

Inertia is the tendency of a body to resist changes in its motion. The statement that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless a net external force acts on it expresses this idea. This is Newton's First Law, commonly called the Law of Inertia. It shows why motion only changes when something external (like friction or a push) acts on the object, and it also explains why an object with greater mass has greater resistance to changes in motion. The other laws describe different ideas: gravity explains attraction between masses, thermodynamics deals with energy and heat flow, and Hooke’s law describes the force of springs. The Law of Inertia specifically naming inertia as the property resisting changes in motion is what’s being asked.

Inertia is the tendency of a body to resist changes in its motion. The statement that an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless a net external force acts on it expresses this idea. This is Newton's First Law, commonly called the Law of Inertia. It shows why motion only changes when something external (like friction or a push) acts on the object, and it also explains why an object with greater mass has greater resistance to changes in motion.

The other laws describe different ideas: gravity explains attraction between masses, thermodynamics deals with energy and heat flow, and Hooke’s law describes the force of springs. The Law of Inertia specifically naming inertia as the property resisting changes in motion is what’s being asked.