Discovering physics /
Shott, Milo.
Farmelo, Graham.
Freake, Stuart.
Swithenby, Steve.
Open University.
Open University.S271 Course Team.
Milton Keynes Open University Press,
1982
At head of title: The Open University
Unit 4. Equilibrium, stability and gravitation / prepared by Milo Shott for the Course Team -- Unit 5. Mechanics revision / prepared by Graham Farmelo, Stuart Freake and Steve Swithenby for the Course Team
Physics.