Which of the following describes an object with zero net force acting on it? Choose all that apply.

It must be speeding up. If an object is accelerating that means it is speeding up.

It must be changing direction. Acceleration is a vector and vectors have both magnitude and direction. Thus if an object is accelerating it must be changing direction.

It must be in free fall.

The forces acting on the object must be greater than the forces the object is exerting.

A net force is acting on it. Only forces cause acceleration. As such, if an object is accelerating it must be because a net force is acting on it.