Here's why:
* Newton's First Law of Motion: This law states that 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.
* Constant Velocity: Constant velocity means the object is moving at a steady speed in a straight line.
* No Net Force: For an object to maintain constant velocity, the net force acting upon it must be zero. This means all the forces acting on the object balance each other out.
Examples:
* A spaceship in deep space: If a spaceship is traveling at a constant velocity in deep space, it will continue moving at that velocity unless acted upon by a force like gravity from a nearby planet.
* A puck sliding on frictionless ice: If a puck is given an initial push on frictionless ice, it will continue sliding in a straight line at a constant speed because there's no friction to slow it down.
Important Note: In real-world situations, it's difficult to have truly zero forces acting on an object. There will always be some form of friction or gravity, which will eventually slow down the object.
