Lesson 3 — force arrows, a force meter, balanced and unbalanced forces

Science period 1
Forces
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Slide 1: Slide
ForcesMiddelbare schoolhavo, vwoLeerjaar 1

This lesson contains 22 slides, with text slides.

Items in this lesson

Science period 1
Forces

Slide 1 - Slide

Force what comes to mind?
Discuss for 2 minutes with your neighbour what you think this chapter will be about.
Class discussion

  • if an object is moving, a force acts on it

This lesson
  • Recap + Checking the homework 
  • Types of forces
  • Measuring force
  •  Drawing force arrows

Slide 2 - Slide

https://www.cpp.edu/respect/resources/documents_3rd/forces/gr3.forces_common_student_ideas.pdf
Goals
  •  Name at least three types of forces + examples
  • Describe how forces are shown in an image
  • Name the unit of force
  • Describe how a force meter works



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Itslearning 

Science period 1

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Class Rules
  • Your phone goes in the phone hotel

  •  Every lesson we take a moment to start and end the class

  •  When you get a task — put in the effort to work on it

  • When you disturb the class you get a warning 

  • When you disturb the class even more, you get put out of the class — Consequences will follow

Slide 5 - Slide

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What have we learned about forces already?

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Force is a push or pull that change the way an object moves.
  • you cannot see forces, only their effect.

Forces can change an object in three ways:
  •  change the speed of an object.
  • change the direction of an object's motion.
  • Change the shape of an objects.


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Discussing the homework

Slide 8 - Slide

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Types of forces
  • Gravitational force
  • Electrostatic force
  • Magnetic force
  • Friction
  • Air resistance
  • Upthrust
  • Tension

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Air resistance

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Upthrust

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Measuring force

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Measuring forces
Distance is measured in...
  • Meters

Time is measured in...
  • Seconds

Force is measured in...
  • Newtons



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Force is measured in: 

newtons (N)

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Force is measured in: 

newtons (N)
named after Isaac Newton

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Force meter

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Drawing force arrows
Force arrows show two things:
  • Magnitude of the force
  • Direction of the force

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Exercise
  • Do the workbook exercises of paragraph 1.1
  • Read paragraph 1.2

Slide 19 - Slide

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Homework
  • The workbook exercises of paragraph 1.1

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Goals
  •  Name at least three types of forces + examples
  • Describe how forces are shown in an image
  • Name the unit of force
  • Describe how a force meter works



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Slide 22 - Slide

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