Answer:
if the net force is greater than zero
Step-by-step explanation:
If two forces acts in opposite directions on an object and no other forces acts on the object, it will accelerate if the net force acting on it is greater than zero.
Acceleration is brought about the net force acting on a body if it is greater than zero.
When the net force on a body is zero, a body will not accelerate and will continue to remain in its state of rest of maintain a uniform unaccelerated motion.