Final answer:
No force is required to maintain the constant velocity of a 2 kg ball moving at 5 m/s in a frictionless environment due to Newton's first law of motion.
Step-by-step explanation:
If friction did not exist and a 2 kg ball was traveling at a constant velocity of 5 m/s, the amount of force required to keep it moving at the same direction and speed would be zero Newtons. This is due to Newton's first law of motion, which states that an object in motion will stay in motion at a constant velocity unless acted upon by an external net force.
In a frictionless environment, as long as the velocity remains constant, no additional force is necessary to maintain its motion.
To keep a 2 kg ball moving at a constant velocity of 5 m/s in the absence of friction, no amount of force would be required. The concept of friction is what causes a force to be applied to keep an object moving at a constant speed. If friction is absent, the ball would continue moving at the same direction and speed without any force applied.