If the net force on an object at rest is zero, the object will remain at rest. This is one of the postulates of newton's law of motion.
Newton's first law of motion states that "an object will continue in its state of rest or uniform motion unless if it is acted upon by an external force. "
If no net force acts on a body, it will forever remain at rest.
The force on a body causes its motion and acceleration.
A body will continue in uniform motion if no external force acts on it.
