Newton's First Law of Motion

Newton's First Law of Motion states that an object will remain at rest or move in a straight line at a constant speed unless acted upon by an external force. In other words, unless something pushes or pulls on it, an object won't change its state of motion. This law highlights the natural tendency of objects to maintain their current situation—whether they are still or moving. For example, a stationary ball will stay still unless you kick it, and a rolling ball will keep rolling until friction or another force slows it down or stops it.