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Newton's First Law Quick Check
Science 8 Q1 / Force and Motion
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Newton's First Law of Motion, also known as the law of inertia, states that an object at rest will stay at rest, and an object in motion will stay in motion with a constant velocity unless acted upon by an external force. This means that an object will only change its state of motion (speed up, slow down, change direction) if a net force is applied to it. If no net force is acting on an object, its velocity will remain unchanged.
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