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# What are examples of inertia?

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Typical examples of inertia include a passenger's body slightly moving backwards when a vehicle suddenly starts; a passenger's body leaning forward when a moving vehicle stops and a passenger's body jerking to the side when a vehicle maneuvers a sharp turn. Inertia is one of the defining characteristics of matter, which refers to the tendency of any object to remain at rest or continuously move along a straight line.

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Inertia is classified into three types: inertia of rest, inertia of motion and inertia of direction. A leaf falling from the branch of a tree that is disturbed by a strong wind is an example of inertia of rest. A person that falls down after carelessly jumping off a moving train is an example of inertia of motion. Mud that sticks to rotating wheels and are thrown tangentially is an example of inertia of direction.

## Related Questions

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The amount of inertia exhibited by an object depends upon its mass. An object with a smaller mass exhibits a smaller amount of inertia, while an object with a large mass exhibits a large amount of inertia. The two concepts are completely interrelated.

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The law of inertia is a fundamental physics principle used to describe how an object behaves in motion or at rest, particularly when forces are applied to it. The object can be anything that has mass.

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The law of inertia states 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 acted upon by an unbalanced force. The law of inertia is sometimes referred to as Newton's first law of motion.