Why Newton's first law of Motion is known as the law of inertia?

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Newton's First Law of Motion, also known as the Law of Inertia, an object at rest remains at rest and an object in motion remains in motion until it is acted upon by an unbalanced force.
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Teacher - Mathematics and Physics (Grades 9 through 12)

Any object that has a mass also have inertia. The inertia of a body is its resistance to change its state, whether it is the state of rest or the state of motion. Newton's 1st law describes the behaviour of a body to continue its state of rest or state of the motion unless acted upon by an external...
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Any object that has a mass also have inertia. The inertia of a body is its resistance to change its state, whether it is the state of rest or the state of motion. Newton's 1st law describes the behaviour of a body to continue its state of rest or state of the motion unless acted upon by an external force. It is clear that newtons first law describes the inertia of the object, therefore it is also known as the law of inertia. read less
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