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

w e i g h t = m a s s \cdot g r a v i t a t i o n a l f i e l d s t r e n g h t

(N)

(kg)

(N/kg)

Slide 16 - Slide

w e i g h t = m a s s \cdot g r a v i t a t i o n a l f i e l d s t r e n g h t

(N)

(kg)

(N/kg)

Slide 17 - Slide

w e i g h t = m a s s \cdot g r a v i t a t i o n a l f i e l d s t r e n g h t

w = m \cdot g

(N)

(kg)

(N/kg)

Slide 18 - Slide

w e i g h t = m a s s \cdot g r a v i t a t i o n a l f i e l d s t r e n g h t

w = m \cdot g

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 = m \cdot g

6 = 3 \cdot 2

Slide 24 - Slide

w = m \cdot g

6 = 3 \cdot 2

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

lesson 9 — 1.4 gravity

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