Lesson 3 — Closing off 1.1 + intro 1.2

• Natuurkunde / Scheikunde
• Middelbare school
• havo
• Leerjaar 1

Lessonplan

Lesson plan

Opening — 5 min

- Lesson plan

- Goals

- Tug of war — which side applied more force? what effect did that have?

Class phase — 15

- Balanced and unbalanced forces

• Examples — force the students to come up with examples

• Effects — let the students fill in the table of balanced and unbalanced with stationary and moving.

Solo phase — 20 min

- Fill in the table

- Start the homework

Closing — 10 min

- discuss the table

- What have you learned + goals

- Next lesson – homework

Learning goals

• Explain the difference between balanced and unbalanced forces

• Describe the effect of balanced forces

• Describe the effect of unbalanced forces

Lesson plan

•  Recap previous lesson
• Types of forces
• Balanced and unbalanced forces

• Working on exercises

Goals

• Give examples for different types of forces
• Explain the difference between balanced and unbalanced forces

• Described how they effect objects

• Calculate resultant force

Class Phase

What did we cover 

previous Lesson?

Types of forces

• Gravitational force
• Electrostatic force
  
• Magnetic force
  
• Friction
  
• Air resistance
  
• Upthrust
  
• Tension
  

Air resistance

Upthrust

§1.2 Balanced and unbalanced

forces

Tug of war

Balanced and unbalanced forces

• When there is a pair of forces
  
• Pulling in opposite or similar sides
  

The effects of:

Balanced and unbalanced forces

Stationary: When an object is not moving, standing still

Constant velocity: When an object is moving at a constant speed

Acceleration: When the speed of an object is increasing (or decreasing)

	balanced forces	Unbalanced forces
stationary objects
Moving objects

	balanced forces	Unbalanced forces
stationary objects	stays stationary	starts moving
Moving objects	keeps the same speed	accelerates/ decelerates

Resultant force

Solo Phase

Goals

• Explain what is meant by balanced and unbalanced forces
  
• Described how they effect objects
  
• Calculate resultant force
  

Next lesson

Homework

• Read §1.2
  

• Do §1.2 the yellow block questions 

+ workbook question 2