# Lesson 5

Chapter 2 — Forces
Section 2 more than one force
This lesson:

• Recap
• Section 2
• Homework
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Slide 1: Tekstslide
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In deze les zitten 22 slides, met tekstslides.

Lesduur is: 45 min

## Onderdelen in deze les

Chapter 2 — Forces
Section 2 more than one force
This lesson:

• Recap
• Section 2
• Homework

#### Slide 1 -Tekstslide

What is force?
•  Force can accelerate objects
• Change the direction of a moment
• Change the shape of an object (plastic and elastic deformation)

#### Slide 2 -Tekstslide

What is a vector?

#### Slide 3 -Tekstslide

What is a vector?
A force vector always has three things:
• A magnitude
• A direction
• A point of exertion

#### Slide 7 -Tekstslide

center of gravity

#### Slide 8 -Tekstslide

You can also calculate it

• Fg: Gravitational Force
• M: Mass
• g: gravitational field strength
Fg=mg

#### Slide 9 -Tekstslide

Practice exercise
A cat ended up on a planet, but we're not sure which one. Astronauts know that the cats mass is 6,3 kg. Their weight on this planet is 88,641 N.

Which planet did the cat end up on?

Use the table to the right to find the answer.

#### Slide 10 -Tekstslide

Section 2 – More than one force

Resultant force

Resultant force

Resultant force

#### Slide 14 -Tekstslide

Use the parallelogram method do do exercise 8

#### Slide 15 -Tekstslide

Force and extension

#### Slide 16 -Tekstslide

Force and extension

#### Slide 17 -Tekstslide

Force and extension

#### Slide 18 -Tekstslide

Force and extension
C=xF
C: Spring constant (in N/m)
F: Force (in N)
x: Extension (in m)

#### Slide 21 -Tekstslide

Homework
Section 2:
Exercise 5, 6, 7, 8 and 9