1-9 Levers

Levers (p. 26)

Bluetooth

- ON

- VPN off

Stationary

- Writing book

- Pen, pencil

- Calculator

- iPad

Mark

- NO

Lessonup

- YES

Schoolbags in

the cupboard

Phones in the phone bag

1 / 22

Slide 1: Slide

NatuurkundeMiddelbare schoolvwoLeerjaar 3

This lesson contains 22 slide, with interactive quiz and text slide.

Lesson duration is: 50 min

Items in this lesson

Levers (p. 26)

Bluetooth

- ON

- VPN off

Stationary

- Writing book

- Pen, pencil

- Calculator

- iPad

Mark

- NO

Lessonup

- YES

Schoolbags in

the cupboard

Phones in the phone bag

Slide 1 - Slide

Lesson goals

Understand and apply the terminology of levers
Calculate the moment of a force
Name and apply the law of levers to

- Calculate force or mass

- Calculate the length of the arm

Slide 2 - Slide

Fulcrum, length of arm, force

fulcrum

Force

length of arm

Slide 3 - Slide

Fulcrum

Better understood if you know that in dutch this is called 'het draaipunt'

Force

You can claculate this with F = m x g

Length of the arm

Distance between the fulcrum and the force

Slide 4 - Slide

moment = force x length of arm

Force in newton

Length of arm in meters

Moment is in newton meter

M = F \cdot r

Slide 5 - Slide

moment = force x length of arm

Force in newton

Length of arm in meters

Moment is in newton meter

M = F \cdot r

F = m \cdot g

Slide 6 - Slide

Length of arm...

from fulcrum to line of action of the force

Slide 7 - Slide

Law of levers

When a lever is in equilibrium, the sum of the clockwize moments equals the sum of the anticlockwise moments.

Formula

M^{​ 1 ​ ​} + M^{​ 2 ​ ​} + . . . (a n t i c l o c k w i s e) = M^{​ 1 ​ ​} + M^{​ 2 ​ ​} + . . . (c l o c k w i s e)

Slide 8 - Slide

Moment of a force

anticlockwise clockwise

or rotate left or rotate

right

equilibrium

Slide 9 - Slide

Example 4 (p. 28)

Slide 10 - Slide

Example

(p. 29)

Slide 11 - Slide

Example 5 (p. 29)

Slide 12 - Slide

Now you...

Calculate if this lever is in equilibrium if each mass is 4 kg

Slide 13 - Slide

What is the unit of moment?

Newton

meter

Newton.meter

Newton per meter

Slide 14 - Quiz

Now try 38

timer

4:00

Slide 15 - Slide

Slide 16 - Slide

Maak opgaven 39

timer

5:00

Slide 17 - Slide

Slide 18 - Slide

Maak opgaven 40

timer

5:00

Slide 19 - Slide

Slide 20 - Slide

Homework

41 in the digital method (you need the worksheet)

Slide 21 - Slide

What did you
learn today?

Slide 22 - Mind map

1-9 Levers

Items in this lesson

Slide 1 - Slide

Slide 2 - Slide

Slide 3 - Slide

Slide 4 - Slide

Slide 5 - Slide

Slide 6 - Slide

Slide 7 - Slide

Slide 8 - Slide

Slide 9 - Slide

Slide 10 - Slide

Slide 11 - Slide

Slide 12 - Slide

Slide 13 - Slide

Slide 14 - Quiz

Slide 15 - Slide

Slide 16 - Slide

Slide 17 - Slide

Slide 18 - Slide

Slide 19 - Slide

Slide 20 - Slide

Slide 21 - Slide

Slide 22 - Mind map

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1-4 Spring constant

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1-10 Levers with a fulcrum at the end

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