Core Idea PS2:Motion and Stability: Forces and Interactions

1. PS2.A:Forces and Motion

1.1. The Push and Pull of objects when they collide.

1.1.1. Change of Speed and Direction

2. PS2.B:Types of Interactions

2.1. Objects exert forces on each other

2.1.1. Electric, magnetic, and gravitational forces

3. PS2.C:Stability and Instability in Physical Systems

3.1. A system can change as it moves in one direction, shifts back and forth,or goes through cyclical patterns

3.1.1. Changes can happen very quickly or very slowly