Table of contents

1. Forces:
   • cause and effects
   • drawing forces
   • measuring forces; newtonmeters
2. Balanced forces:
   • stationary object
3. Unbalanced forces:
   • effects of unbalanced forces
4. Springs:
   • elastic materials
   • a flipper game
   • measuring the force springs exert
5. Stretching a spring:
   • extension of the spring
   • overstretching a spring
6. Keywords: English-German