Describe what is happening to an object in each of the following three states: 1) the object has positive acceleration 2. the object has negative acceleration 3. the object has an acceleration of zero

1. If the object has positive acceleration there is a force acting on the object to make it move. A positive acceleration means the speed of that object is increasing by the acceleration's magnitude per second. The object is said to accelerating.

2. If the object has negative acceleration, the object is decelerating. It's speed is decreasing as the force going opposite of the object increases by the negative acceleration's magnitude per second.

3. If the object has no acceleration. The object is either at rest or has a constant velocity. There may be no force acting on the object or the net force on the object is zero.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s