This web page describes inertial and non-inertial frames of reference, the latter being frames where Newton's laws do not hold. The text explains "fictitious forces", the centrifugal…

This small group activity is designed to help upper division undergraduate students analyze a standard problem about colliding lumps of clay. Students work in small groups using…

This small group activity is designed to help upper division undergraduate students realize the connection between special relativity and electromagnetism. Students work in groups…

This small group activity is designed to help upper division undergraduate students compute relativistic energy and momentum in different reference frames. Students work in small…