An object is moving in a straight line at a constant speed. What will happen to the object of no outside force acts on the object?

Answer 1

If no outside force acts on the object, it will continue to move in a straight line at a constant speed. This is known as Newton's First Law of Motion, also called the law of inertia, which states that an object at rest will remain at rest and an object in motion will remain in motion with a constant velocity, unless acted upon by an external force.