Lesson 5

• Physics
• Middelbare school
• vwo
• Leerjaar 3

Chapter 2 — Forces

Section 2 more than one force

This lesson:

• Recap
• Section 2
• Homework

What is force?

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

What is a vector?

What is a vector?

A force vector always has three things:

• A magnitude
  
• A direction
  
• A point of exertion
  

center of gravity

You can also calculate it

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

F​g​​=m⋅g

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.

Section 2 – More than one force

Resultant force

Resultant force

Resultant force

Use the parallelogram method do do exercise 8

Force and extension

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

Section 2:

Exercise 5, 6, 7, 8 and 9