If there are no external forces acting on an object, its linear speed and angular velocity will remain constant due to the principle of conservation of momentum and conservation of angular momentum, respectively.
Linear Speed: The linear speed of an object refers to the rate at which it covers distance in a straight line. According to Newton's first law of motion (the law of inertia), if no external force is acting on an object, it will continue to move with a constant velocity. This means that the object will maintain its linear speed and direction.
Angular Velocity: The angular velocity of an object refers to the rate at which it rotates around an axis. Similarly, if there are no external torques acting on an object, its angular velocity will remain constant. This is known as the conservation of angular momentum. Angular momentum is the product of the object's moment of inertia and its angular velocity. If no external torques are present, the angular momentum will be conserved, leading to a constant angular velocity.
It's important to note that these principles hold true in the absence of external forces or torques. If external forces or torques are introduced, the linear speed and angular velocity of the object can change as a result of the applied forces or torques.