Lesson 3

• Physics
• Middelbare school
• vwo
• Leerjaar 3

Chapter 2 — Forces

Section 2 more than one force

This lesson:

• Previous lesson
• Discussing the homework
• Section 2
• Working on exercises

Previous lesson

Measuring force

You can also calculate it

• F_g: Gravitational Force
  
• M: Mass
  
• g: gravitational field strength
  

F​g​​=m⋅g

You can also calculate it

• F_g: Gravitational Force
  
• M: Mass
  
• g: gravitational field strength
  

F​g​​=m⋅g

Drawing forces — Vectors

Forces has:

• A magnitude
• A direction
• A point of exertion

When you draw forces you first decide a force scale. 

For example: 1 cm ≡ 5 N.

center of gravity

Discussing the homework

Discussing the homework

Section 2

More than one force

Forces accelerate

• In that case we're talking about net force.
  
• What is Net force?

Resultant force

Resultant force

Force and extension

Force and extension

Link

Force and extension

Link

Force and extension

Link

Force and extension

C=​x​​F​​

C: Spring constant (in N/m)

F: Force (in N)

x: Extension (in m)

Homework

Read: Chapter 2, Section 2

Do: Exercise 3, 4, 5 and 6

Section 2

More than one force

Forces accelerate

• In that case we're talking about net force.
  
• What is Net force?

Resultant force

Resultant force

Resultant force

Force and extension

Force and extension

Link

Force and extension

Link

Force and extension

Link

Force and extension

C=​x​​F​​

C: Spring constant (in N/m)

F: Force (in N)

x: Extension (in m)

Homework

Read: Chapter 2, Section 2

Do: Exercise 3, 4, 5 and 6