1-1 Introduction and forces

Introduction and forces
(p. 8)


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Slide 1: Tekstslide
NatuurkundeMiddelbare schoolvwoLeerjaar 3

In deze les zitten 16 slides, met interactieve quizzen en tekstslides.

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Introduction and forces
(p. 8)


Stationary
- Book and writingbook
- Pen, pencil
- Calculator
- iPad
REPORT
- NO


Lessonup
- YES
Schoolbag in
the cupboard
Phones in the phonebag

Slide 1 - Tekstslide

Forces can do three things:
  • Change the speed of an object
  • Change the direction of an object
  • Change the  
       shape of an
       object

Slide 2 - Tekstslide

Types of forces:
  • Muscular strength
  • Resistance or resilience
  • Tention (rope)

  • Gravity
  • Magnetic force
  • Friction
                       or
Forces are measured with a dynamometer in Newton.
Fmusc
Fr
FT
Fgr
Ff
f

Slide 3 - Tekstslide

Calculating gravitational force:
To calculate the gravitational force on an object we use the formula... 
F = mg 
where g = 9.8 N/kg

Slide 4 - Tekstslide

Calculating gravity
If you have the mass of an object in kg, 
then you can calculate the force of gravity with:
mass x 9.8
Fgr

Slide 5 - Tekstslide

Example 1
What is the gravitational force of an object with a mass of
 550 grams?

Slide 6 - Tekstslide

Example 2
If the gravity on an object is 900 N, what then is the mass of the object?

Slide 7 - Tekstslide

Which of the following is NOT an effect of forces:
A
Increase speed
B
Change direction
C
Change shape
D
Attract an object

Slide 8 - Quizvraag

Which of the following is NOT a type of force?
A
Muscular strength
B
Mass force
C
Magnetic force
D
Resilience

Slide 9 - Quizvraag

What can be used to measure forces?
A
Ruler
B
Dynamometer
C
Newton scale
D
An estimation

Slide 10 - Quizvraag

What must be the unit of mass if you want to calculate force?
A
ton
B
kg
C
g
D
mg

Slide 11 - Quizvraag

When do you divide with 9,8 and when do you multiply with 9,8?

Slide 12 - Open vraag

What is the gravitational force on a tennis ball with a mass of 56 grams?
A
548,8 N
B
5,7 N
C
0,549N
D
0,57N

Slide 13 - Quizvraag

What is the mass of an antelope with a gravitational force of 2 499 N?
A
255 kg
B
2,55 kg
C
24 490 kg
D
24,49 kg

Slide 14 - Quizvraag

What did you
learn today?


Slide 15 - Woordweb

Conclusion:
  • Forces can change the speed, direcition 
     and shape of an object.
  • With elastic deformation the object returns to its original shape and with plastic deformation the deformation is permanent.
  • Types of forces: Muscular strength, resilience, gravitational force and magnetic force.


F=ma

Slide 16 - Tekstslide