# first law of motion

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Related to first law of motion: third law of motion
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 Noun 1 first law of motion - a body remains at rest or in motion with a constant velocity unless acted upon by an external forcelaw of motion, Newton's law, Newton's law of motion - one of three basic laws of classical mechanics
References in periodicals archive ?
When your plane is stationary, it's a good time to consider Isaac Newton's First Law of Motion, regarding inertia.
According to First Law of Motion, if lifeless matter is at rest, it tends to remain at still unless it is moved by some external force, and if it is in motion it continues to move unless it is stopped by some external factor.
In physics, the first law of motion says that a body at rest will remain at rest, and a body in motion will remain at the same uniform speed unless an external force acts upon it.
The group has met weekly, covering a variety of STEM-focused topics such as the Scientific Method, Bernoulli's Principle, Pascal's Law, Newton's first law of motion and more.
Newton's First Law of Motion states that an object in motion stays in motion unless an outside force acts upon it.
Dr Sellers said: "I'm pretty sure that Sir Isaac would have loved to see this, assuming he wasn't spacesick, as it would have proved his first law of motion to be correct.
I'm pretty sure Sir Isaac would have loved to see this, as it would have proved his first law of motion to be correct," he added.
The First Law of Motion is the law of inertia: "A body remains at rest, or if in motion, it remains in uniform motion with constant speed in a straight line, unless it is acted on by an unbalanced external force.
Whose first law of motion states that a body remains at rest, or in motion with a constant velocity, unless acted on by an external force?
Indeed, many difficulties concerning inertia and the First Law of Motion may be resolved by understanding them through an Aristotelian conception of nature.
Sir Isaac Newton's First Law of Motion states that an object at rest tends to stay at rest and that an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Newton's First Law of Motion states that unless acted upon by an external force, a body at rest will remain at rest and a body in motion will remain in motion.

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