Motion and Stability: Forces and Interactions

1. Stability and Instability

1.1. Balanced Forces

1.1.1. Objects at rest

1.1.1.1. Stay at rest

1.1.2. Objects in motion

1.1.2.1. Stay in motion

1.2. Unbalanced Forces

1.2.1. Positive acceleration

1.2.2. Negative acceleration

2. Forces and Motions

2.1. Push and Pull

2.1.1. Speed

2.1.1.1. Fast

2.1.1.2. Slow

2.1.2. Direction

2.1.2.1. Slide

2.1.2.2. Spin

2.1.2.3. Roll

2.1.2.4. Zigzag

2.1.2.5. Straight Line

3. Types of Interactions

3.1. Gravity

3.1.1. Keeps up on ground

3.1.2. Makes things fall

3.1.3. Keeps up from floating away

3.2. Electro Magnetism

3.2.1. Attract-pull toward

3.2.2. Repel