Answer:
Newton's First Law of Motion states that an object at rest will remain at rest unless acted on by an external force and an object in motion continues remains in motion with the same speed and direction unless acted on by an external force. This is also called the law of inertia.
A basketball rolling across a court follows this law. It does not continue with the same speed because there are external forces such as friction between the ball and the floor and air resistance acting to slow the ball down and ultimately bring it to rest.
