What does Newton’s first law of motion state?
An object remains at rest or moves in a straight line at constant velocity unless a resultant external force acts on it.
AQA GCSE Combined Science: Trilogy (8464) — Physics — Foundation · 6.5.4.2.1
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What does Newton’s first law of motion state?
An object remains at rest or moves in a straight line at constant velocity unless a resultant external force acts on it.
What is an object’s acceleration when the resultant force on it is zero?
Zero.
What is inertia?
The tendency of an object to resist changes in its motion.