Believe it or not gravity is not really a force, it is an acceleration and on Earth it is about 32 feet/sec2. This same science principle applies in decelerating devices like parachutes and parafoils. The parachute decelerates or slows down the fall of the object.
What is a .DS_Store or ._ AppleDouble file? .DS_Store files are created by OS X to store metadata about folders and files including viewing options, icon positions and color labels. ._ AppleDouble files are created by the OS X when an application adds resource data or metadata to a file on a disk whose format doesn't support resources or metadata.
Let me explain what the CONFIG.MSI folder is, where its located, and if you can remove it safely. First of all, the CONFIG.MSI folder is a hidden folder on the root drive of Windows, usually Drive C. The folder is used by the Windows Installer process during an installation of software. It saves files with the extension of .RBS and .RBF.