Forces and Pressure

1. Types of forces

1.1. Gravitational force

1.2. Frictional force

1.2.1. It prevents us from slipping

1.3. Magnetic force

1.3.1. Used in fridges and other appliances

2. What a is a force?

2.1. A push or a pull

3. What is pressure?

3.1. It is the force acting perpendicularly per unit area

4. How do you increase pressure?

4.1. Increase the contact surface area

4.2. Decrease the amount of force

5. What do you use to measure the amount of force acting on an object?

5.1. Spring balance

6. How do you calculate pressure?

6.1. Take the force divided by the area