free fall

Free fall  describes any motion of a body where gravity is the only or dominant force acting upon it, at least Initiating. Since this definition does not specify velocity, it also applies to objects Initiating Upward moving. Although strictly the definition excludes motion of an object subjected to other Forces such as aerodynamic drag, in nontechnical usage falling through an atmosphere without a deployed parachute or lifting device is also referred to as free fall.

Well because the speed initially equal to zero, so things including free fall motion. Until persamaanya are:

when we want to know over time things get to the floor:

Speed ​​things just before touching the floor:

Just curious if you still try to do the following simple experiment:

Tools needed:

1. A book, eraser, ball, or anything that can be passed

2. Ruler (length measuring instrument)

3. Stopwatch

Step Experiments

1. Take the things that we drop (we take the example of removal).

2. Determine the height from the floor where we will drop the eraser.

3. Once the height is determined, drop removal from the place specified above.Remember that things must fall freely so there can be no encouragement from our hands, let the thing fall freely)

4. We drop equal to removing, run the stopwatch as the start of the computation time.

5. Removing the right turn off the stopwatch when touching the floor. Read the measurement results on the stopwatch.

6. Compare our experiment results earlier in the calculation of the formula. Give your conclusions.

7. To be more confident that you must do the experiment several times.

Although our experiment was very simple but hope to be the basis for the development of science in our country. Start with small things. A leading scientist  Sir Isaac Newton  discover the Law of universal gravity inspired aple pohonya free fall. 
Newton himself often Told the story that he was Inspired to formulate his theory of Gravitation by watching the fall of an apple from a tree.

Resources:

http://fisika-online.blogspot.com/2010/03/gerak-jatuh-bebas