# Unit 3 – Forces in Equilibrium

### (Statics and Newton’s First Law of Motion)

## Unit 3 Learning Targets

**3-1: I can describe the ideal conditions applied to the study of forces (Ignoring friction).**

**3-2: I can diagram and calculate the horizontal and vertical components of force.**

**3-3: I can explain contact forces on the atomic scale using the particle model.**

**3-4: I can mathematically describe friction forces.**

**3-5: I can explain and calculate the apparent weight of an object when it's acceleration is zero.**

**3-6: I can apply Newton's first law of motion to mathematically describe and predict the effects of forces on complex systems of objects.**

## Vocabulary

**Component-**

**A vector is a quantity that has both magnitude and direction**

**Equilibrium-**

**Free Body Diagram-**

**Inertia-**

**System-**