Force

1. Gravity

1.1. Attraction of gravity

1.1.1. If mass increases, than gravity increases.

1.1.2. If distance increases, than gravity decreases.

1.2. Mass

1.3. Weight

2. Measurment of force

2.1. Discovered by Issac Newton

2.1.1. Law of gravity

3. Types of Force

3.1. Balanced Force

3.2. Unbalanced Force

4. Friction

4.1. Static friction

4.2. Sliding friction

4.3. Rolling friction

4.4. Fluid friction