Question

What net force is required to keep a $500kg$ object moving with a constant velocity of $10m/s?$

Answer 1

According to Newton’s first law of motion, there is no net force required to keep an object moving if it's in motion. A net force is only required to change an object's motion. The $500kg$ object is moving at a constant velocity.
Therefore, there is no net force $\left(0newtons\right)$ requires to keep the object moving with constant velocity.
Final answer: 0