What net force is required to maintain a 5,000 kg object moving at a constant velocity of magnitude 7,500 m / s ?

Explanation

The first law says that any object will continue in its state of motion unless a force acts on it. Therefore, no net force is required to maintain a 5,000 kg object moving at a constant velocity of magnitude `7,500 m//s`. Here's another way to look at in Constant velocity means a=0, so the equation `F_("act")= ma` immediately gives `F_("net")=0`.