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What has inertia?

Updated: 9/16/2023
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13y ago

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Inertia is the resistance to changes in motion. Inertia is proportional to mass. Big masses resist changing their motion more than smaller masses. Every object remains in a state of rest or of uniform motion in a straight line unless acted upon by an outside force.

Example:

Objects at rest remain at rest unless acted on by a net force.

A lot of inertia! The large train resists changing its motion.

Very little inertia. The small baby carriage has very little resistance to changes in motion.

Since the train is so huge, it is difficult to change its speed. In fact, a large net force is required to change its speed or direction.

Since the baby carriage is so small, it is very easy to change its speed or direction. A small net force is required to change its speed or direction.

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13y ago
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