Slow in and Slow Out is one of the 12 Animation Principles

Slow in and Slow out
To make movement seem more realistic, start with a slow speed and end with a slow speed. This means you draw you more images near beginning, and near the end of you sequence. In After Effects we will use the GRAPH instead of drawing to create the slow in/slow out effect. We will also refer to the slow in/out as EASE IN/OUT in After Effects.

For this practice:

Use SEPERATE DIMENSIONS in Position
Use the GRAPH EDITOR
Experiment with EASE IN / OUT and EASY EASE
Use MOTION BLUR

Name:
Ease and Blur Practice

Size:

New Composition: HDV/HDTV 720 25

0:00:03:00 for duration

To Export:

File > Export > Add to Render Queue

Render Settings: Best Settings
Output Module : H.264 – Match Render Settings
Output : Add your file name NAME_AE_Ease_and_Blur_Practice

Press Render

Export to Lastname_AE_Ease_and_Blur.mov