What are the system requirements for Vernier Video Physics?

Software requirements:
Vernier Video Physics is available in the App Store. Video Physics requires iOS 5.1 or newer.
http://www.vernier.com/video-physics

Recommended hardware:
Video Physics is compatible with iPhone 3GS and newer, iPod touch 3rd generation and newer, and iPad (all models).

Hardware limitations of iPod touch 2nd generation and iPhone 3G restrict some of the features of Vernier Video Physics.

Incompatible devices: original iPhone and iPhone 3G, 1st- and 2nd-generation iPod touch.

Identifying iPod models: http://support.apple.com/kb/ht1353
Identifying iPhone models: http://support.apple.com/kb/HT3939