1. Mass: the quantity of matter in an object
2. Inertia: the natural tendency of an object to resist any change in its original state, whether at rest or in motion
3. Newton's First Law of Motion states that an object will remain in its original state, that is, being at rest or in motion with constant speed if no external force acts on it
4. The inertia of an object is affected by its mass
5. Effect of inertia in daily life
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