Yes, an object can be in motion even if no external forces are acting on it. This is due to Newton's First Law of Motion, also known as the Law of Inertia.

Newton's First Law states:

* An object at rest stays at rest, and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

This means that if an object is already moving, it will continue to move at a constant velocity (constant speed and direction) without the need for any additional forces.

Examples:

* A hockey puck sliding on frictionless ice will continue to move at a constant speed in a straight line even though no one is pushing it.

* A satellite orbiting Earth is constantly in motion but doesn't require any additional force to stay in orbit.

Important Note:

* In reality, there are always some external forces acting on objects, such as friction or air resistance. These forces can eventually cause the object to slow down or change direction.

* However, in ideal situations where no external forces are present, an object in motion will stay in motion forever.