lesson 9 — 1.4 gravity

1.4 Gravity
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Slide 1: Slide
Natuurkunde / ScheikundeMiddelbare schoolhavo, vwoLeerjaar 1

This lesson contains 28 slides, with text slides and 1 video.

Items in this lesson

1.4 Gravity

Slide 1 - Slide

This lesson
  • Recap previous lesson
  • mass, weight and gravitational field strength
  • Working independently

Slide 2 - Slide

Learning goals
    • Explain the cause of gravity

    • Describe the difference between mass and weight.

    • Explain gravitational field strength

    • Calculate weight, mass and gravitational field strength

    Slide 3 - Slide

    Recap

    What did we cover?

    Slide 4 - Slide


    What is the cause 

    of gravity?

    Slide 5 - Slide


    What is the cause 

    of gravity?
    Follow along with the video, figure out what their final conclusion is on what gravity is. Write it down after the video.

    Slide 6 - Slide

    Slide 7 - Video

    Attractive force between any two object with mass.

    Slide 8 - Slide

    The difference between 

    mass and weight

    Slide 9 - Slide

    Slide 10 - Slide

    Mass and weight
    Mass
    • How much matter something is made of
    • does not change with location
    • Measured in kg
    Weight
    • the force of gravity acting on a specific object
    • Depends on the gradational field something is in
    • Measured in newton

    Slide 11 - Slide

    Learning goals
      • Explain the cause of gravity

      • Describe the difference between mass and weight.

      • Explain gravitational field strength

      • Calculate weight, mass and gravitational field strength

      Slide 12 - Slide

      • all mass applies an attractive force on all other mass. The gravitational force.

      • the strength of this attractive force depends on the amount of mass (in kg)

      • The more mass something is made of, the greater its gravitational force is on other masses.

      • the amount of newtons a body of mass applies to other masses per kilogram is called its gravitational field strength (N/kg)



      Gravitational field strength

      Slide 13 - Slide

      The amount of newtons a body of mass applies to other masses per kilogram (N/kg)
      Gravitational field strength

      Slide 14 - Slide

      The amount of newtons a body of mass applies to other masses per kilogram (N/kg)
      Gravitational field strength
      For example:
      The gravitational field strength on Earth is 10 N/kg

      The gravitational field strength on Jupiter is 23 N/kg

      Slide 15 - Slide

      weight=massgravitationalfieldstrenght
      (N)
      (kg)
      (N/kg)

      Slide 16 - Slide

      weight=massgravitationalfieldstrenght
      (N)
      (kg)
      (N/kg)

      Slide 17 - Slide

      weight=massgravitationalfieldstrenght
      w=mg
      (N)
      (kg)
      (N/kg)

      Slide 18 - Slide

      weight=massgravitationalfieldstrenght
      w=mg
      • W: weight (N)
      • m: mass (kg)
      • g: gravitational field strength (N/kg)
      (N)
      (kg)
      (N/kg)

      Slide 19 - Slide

      Slide 20 - Slide

       11.3 kg
      21.7 kg
      44.8 kg
      Weight (N)
      On earth
      Weight (N)
      On mars
      Weight (N)
      On planet Z
      135.6
      260.4
      537.6
      Weight mass x gravitational field strength
      See the table on the right.

      a) fill in the weight of the masses on earth and mars.

      b) calculate the gravitational field strength of planet Z
      Gravitational field strength earth = 10 N/kg
      Gravitational field strength mars = 3.7 N/kg

      Slide 21 - Slide

       11.3 kg
      21.7 kg
      44.8 kg
      Weight (N)
      On earth
      113
      217
      448
      Weight (N)
      On mars
      Weight (N)
      On planet Z
      135.6
      260.4
      537.6
      Weight mass x gravitational field strength
      See the table on the right.

      a) fill in the weight of the masses on earth and mars.

      b) calculate the gravitational field strength of plante Z
      Gravitational field strength earth = 10 N/kg
      Gravitational field strength mars = 3.7 N/kg

      Slide 22 - Slide

       11.3 kg
      21.7 kg
      44.8 kg
      Weight (N)
      On earth
      113
      217
      448
      Weight (N)
      On mars
      41.81
      80.29
      165.76
      Weight (N)
      On planet Z
      135.6
      260.4
      537.6
      Weight mass x gravitational field strength
      See the table on the right.

      a) fill in the weight of the masses on earth and mars.

      b) calculate the gravitational field strength of plante Z
      Gravitational field strength earth = 10 N/kg
      Gravitational field strength mars = 3.7 N/kg

      Slide 23 - Slide

      w=mg
      6=32

      Slide 24 - Slide

      w=mg
      6=32
      Exercise
      Rearrange the formula to use it to calculate:

      a) mass

      b) gravitational field strength

      Slide 25 - Slide

       11.3 kg
      21.7 kg
      44.8 kg
      Weight (N)
      On earth
      113
      217
      448
      Weight (N)
      On mars
      41.81
      80.29
      165.76
      Weight (N)
      On planet Z
      135.6
      260.4
      537.6
      Weight mass x gravitational field strength

      Calculate the gravitational field strength of planet Z
      Gravitational field strength earth = 10 N/kg
      Gravitational field strength mars = 3.7 N/kg

      Slide 26 - Slide

      Homework
      Workbook exercises 1.4
      Exercise 1, 2, 3 and E

      Slide 27 - Slide

      Learning goals
      • Explain the cause of gravity

      • Describe the difference between mass and weight.

      • Explain gravitational field strength

      • Calculate weight, mass and gravitational field strength

      Slide 28 - Slide