Ans. According to Newton's First Law of Motion, an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and direction, unless acted upon by an external force. This means that an object can be in motion without any external force acting on it if there are no other forces present to change its state of motion or bring it to rest. However, in reality, it is difficult to find a completely isolated system where no external forces are present.