Which of the following statements is Newton's 1st Law of Motion? A. The object will move in the direction of the unbalanced force. B. Whenever one object exerts a force on a second object, the second object exerts an equal and opposite force on the first. C. An object at rest remains at rest and an object in motion remains in motion at a constant speed and in a straight line, unless acted upon by an unbalanced force.

C. An object at rest remains at rest and an object in motion remains in motion at a constant speed and in a straight line, unless acted upon by an unbalanced force.

Explanation:

In essence, Newton's first law of motion states that an object at rest won't move unless an outside force causes it to move. Similarly, an object moving at a constant speed will continue moving at that same speed indefinitely, unless an outside force causes it to change speed.