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Free Fall - help3

Free falling objects accelerate downward at a rate of approximately 10 m/s/s (or 9.8 m/s/s). As they move upward towards their highest point, they slow down. And as they fall downward from their highest position, they speed up. While the speed (and velocity) undergo these changes, the acceleration remains a constant value and is always directed downward.

There are two very similar versions of this question. Here is one of those versions.

Version 1
A tennis ball is hit straight upwards and undergoes a free fall motion as it rises towards its highest point. What changes, if any, would be observed of the velocity and the acceleration of the tennis ball as it rises towards its highest point? Pick two answers.
The velocity increases.
The velocity decreases.
The velocity remains a constant value.
The acceleration increases.
The acceleration decreases.
The acceleration remains a constant value.

In this question, an object is rising upward from the ground towards its highest position. It is under the sole influence of gravity so it will accelerate like any free-falling object. You must describe the changes, if any, that occur to the velocity and acceleration of the object. Here's what you need to know:

Regarding Velocity
As free-falling objects move upward, they slow down. Their speed is decreasing. Velocity is speed with a direction. So if the speed is decreasing, then the velocity is also decreasing.

Regarding Acceleration
Free-falling objects have a constant acceleration of -9.8 m/s/s (approximately -10 m/s/s. Acceleration is related to changes in velocity. It is the rate of velocity change. For a free-falling object, the velocity always changes by the same amount for every 1 second of falling. For every 1 second of fall, the velocity ALWAYS changes by -10 m/s. This is always the case; it is a constant acceleration rate.

Try the links below to our Tutorial for more information:

Free Fall: How Far? and How Fast?

Acceleration Caused by Gravity