Y2_T4_LSN4.1

Topic 4
MOVEMENT IN THE WORLD GRADES:

  • LABJOURNAL (4X)
  • QUIZ (1X)
  • TOOTHPASTE PROJECT (2X)
  • TEST (4X)
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Slide 1: Slide
ScienceMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 20 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 90 min

Items in this lesson

Topic 4
MOVEMENT IN THE WORLD GRADES:

  • LABJOURNAL (4X)
  • QUIZ (1X)
  • TOOTHPASTE PROJECT (2X)
  • TEST (4X)

Slide 1 - Slide

§4.1 Forces

p. 154-157
ex 1-11 p 158-161
Check out plan in magister!

Slide 2 - Slide

§4.1 - Learning Goals:
Content
I can explain what a force is.
I can identify different types of forces.
Language
I can explain how different forces work on objects. 
I can explain how they can interact with each other.
Skills
I can calculate the gravitational force acting on an object.
I can draw arrows on a force diagram with the correct point of application, magnitude and direction.
I can calculate the resultant force of forces going in the same direction or opposite directions of each other.  
VWO ONLY - I can calculate the resultant force of two perpendicular forces

P.154-157

Slide 3 - Slide

§4.1 - Learning Goals:
LG - Step 1: Read the learning goals above carefully. In the 3rd column mark the ones you feel good about with a “+” and the ones you might be a bit worried about with a “-”.

LG - Step 2: Take a good look at the categories of learning goals and compare them to your scores from S1. Now rank your categories from strongest to weakest using the letters A, B & C. (A - being strongest.)

LG - Step 3: Discuss what you have just filled in on your table with your neighbour(s). Try to explain / argue why you made that choice and ask the person for clarifying questions if need be.  

LG - Step 4: Think about what you have just discussed. Make any necessary changes in the marking of your table if need be. Use the last column please!

LG - Step 5: Based on the steps you have just completed, take a look at the table below. What 3 things / goals are you going to focus on this paragraph? Please write them down below.

Slide 4 - Slide

Share at least on goal.

Slide 5 - Mind map

§4.1 - Wordbank

Slide 6 - Slide

§4.1 - Wordbank
WB - Step 1: Take a look at the wordbank above, these are the new keywords for §4.1 - Forces. Complete the wordbank by marking a “✓” if you agree with what is said and leave it empty if not. 

WB - Step 2: Discuss what you have just filled in on your table with your neighbour(s). Try to explain / argue why you made that choice and ask the person for clarifying questions if need be.  

WB - Step 3: Take a look at the separate worksheet activity WB-1. Look at the images and text, try to complete them using the words from the wordbank above. You do this together if you want. 

WB - Step 4: Think about what you have just done and discussed. Make any necessary changes in the marking of your table if need be. Please use a different colour.

WB - Step 5: Based on the steps you have just completed, take a look at the table below. What 3 things / goals are you going to focus on in this paragraph? Please write them down below.

Slide 7 - Slide

Slide 8 - Slide

A world of Forces:
Forces are all around us
  • You can’t see them
  • You can only see their effect

The things forces can do:

  • Object changes shape
  • Object starts to move
  • Object changes speed
  • Direction of object changes
P.154-157

Slide 9 - Slide

Types of Forces:
  • Gravity 
  • Applied force 
  • Air resistance 
  • Friction 
  • Tension force 
  • Spring force 
  • Normal force 

P.154-157
Fg
Fa
Fair
Ff
Ft
Fs
Fn

Slide 10 - Slide

Magnitude of Forces:
Force is measured in Newtons
  • The force needed to lift 1 kg = 9.81 N on earth
  • On the moon the force needed is only 1.6 N
  • The mass is the same
  • Gravitational force is different

P.154-157

Slide 11 - Slide

Calculation gravitational force:


  •        = gravitational force in Newton or weight
  • m = mass in kg
  • 9.81 is a constant


P.154-157
Fg
Fg=m9.81

Slide 12 - Slide

Example: Peter has a mass of 76 kg. What is his gravitational force, ?
Fg

Slide 13 - Open question

Example: The gravitational force of my cat is 34.3N What is her mass?
Fg

Slide 14 - Open question

Drawing Forces:
Forces are represented by an arrow
It has three things:
  • point of application - origin of force
  • direction
  • magnitude (size) - the longer the arrow, the bigger the force


P.154-157

Slide 15 - Slide

Adding & subtracting forces:
  • Two forces in the same direction are added up

  • Two forces in opposite direction are subtracted from each other

If forces are equal, there is no motion



P.154-157

Slide 16 - Slide

Adding & subtracting forces:
  • Resultant force is the sum of the forces
  • It is written as 
Forces in the same direction = add
     

Forces in the opposite direction = subtract
          




P.154-157
Fres

Slide 17 - Slide

Perpendicular forces:
  • Combine the forces end to end by making a triangle



P.154-157

Slide 18 - Slide

Forces worksheet:

  • Try the questions by yourself first.
  • Then try together
  • Then ask for help



P.154-157

Slide 19 - Slide

Hw for lesson 2:
  • Complete the forces worksheet.
  • Complete exercises 1-11 of §4.1 pages 158-161
  • Read §4.2 pages 162-165
  • Study the glossaries of §4.1-§4.2 on Studygo.

P.154-157

Slide 20 - Slide