In the fictional world of Superman, the character is often depicted as being able to move faster than the speed of light. However, it's important to note that this portrayal is a work of fiction and does not adhere to our current scientific understanding.
In the DC Comics universe, Superman's ability to move faster than light is usually attributed to his superhuman powers, particularly his incredible speed and the ability to fly. These powers are typically explained as being a result of his Kryptonian physiology and exposure to Earth's yellow sun.
The concept of the "speed force" you mentioned is actually associated with the DC Comics character Flash, rather than Superman. The speed force is a fictional energy field that grants various superhuman abilities, including the ability to move at superluminal speeds. Flash's interactions with the speed force are integral to his powers and serve as a protective mechanism, preventing him from being destroyed or harmed by the extreme velocities he can achieve.
However, Superman's ability to move faster than light is often depicted differently. He is portrayed as having the power to break the light barrier without explicitly relying on a specific force or energy field. The exact mechanics of how he does this are often left unexplained, as it is primarily a fictional concept created for storytelling purposes rather than being grounded in real-world scientific principles.
In summary, Superman's ability to move faster than light is purely a fictional construct, and the concept of the speed force is not typically associated with him. It's important to differentiate between fictional representations and scientific principles when discussing such topics.