Question

What is force's inertia?

Answer 1

Answer:

A fictitious force is a force that appears to act on a mass whose motion is described using a non-inertial frame of reference, such as an accelerating or rotating reference frame

Answer 2

When you apply a force on a freely moving object in order to accelerate, decelerate, or change its direction, an equal inertial force acts on the object in an opposite direction of your applied force. ... For example, when you push on an object, you can feel its resistance to the change in speed or direction.

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