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7Which of the following statements is true about an object? A. If the object is moving, it will keep moving until acted on by a force. B. If the object is moving in a straight line, eventually it will change direction on its own. C. If the object is not moving, eventually it will start moving on its own. D. If the object is moving, eventually it will stop moving on its own.

Question

7Which of the following statements is true about an object? A. If the object is moving, it will keep moving until acted on by a force. B. If the object is moving in a straight line, eventually it will change direction on its own. C. If the object is not moving, eventually it will start moving on its own. D. If the object is moving, eventually it will stop moving on its own.

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Solution

The correct statement is A. "If the object is moving, it will keep moving until acted on by a force." This is a basic principle of physics known as Newton's first law of motion, or the law of inertia. It states that an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force. The other statements B, C, and D are not generally true according to the laws of physics.

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