3.4

Question 1

What’s the difference between masse and poids?

Answer 1

The masse is same even if the gravity is stronger, but poids will be affected by gravity being stronger.

Question 2

Why is the balance the most effective way of measuring mass? (Why does it still work with higher gravity)

Answer 2

Because there is a counter-weight that is also affected by gravity the same as the object being measured.

Question 3

What are the two main types of forces (general types)

Answer 3

Les forces au contact et les forces au distance.

Question 4

What type of force is the tension?

Answer 4

Force au contact

Question 5

What type of force is the friction?

Answer 5

Force of contact

Question 6

What type of force is the élasticité?

Answer 6

Force of contact

Question 7

What type of force est la force gravitationnelle?

Answer 7

Un forces au distance.

Question 8

What type of force est la force électrostatique?

Answer 8

Un forces au distance.

Question 9

What type of force est la force magnétique?

Answer 9

Un forces au distance.

Question 10

Name 3 examples of a force de contact.

Answer 10

Tension, friction, élasticité.

Question 11

Name 3 examples of a force de distance.

Answer 11

Force gravitationnelle, force électrostatique, force magnétique.

Question 12

what are instruments de mesure d’une force?

Answer 12

d’un ressort ou d’un élastique

(qui s’étire ou se comprime en réaction à une poussée ou à une traction.)

Question 13

What is the most used tool to measure force?

Answer 13

Le capteur de force le plus utilisé est le
dynamomètre.

Question 14

Is mass and weight proportional?

Answer 14

Yes

Question 15

What is the formula for poids from masse?

Answer 15

Poids = masse * constante gravitationnelle (10N / kg)

Question 16

What is the constante gravitationnelle?

Answer 16

10N / kg

Question 17

Les forces en équilibre

Answer 17

sont
d’égale grandeur et de sens contraires.

Question 18

Les forces en déséquilibre

Answer 18

provoquent un changement de vitesse ou de direction d’un objet.

Question 19

A book is on a table, what is keeping the book from breaking the table?

Answer 19

The force normale par le table.

Question 20

La force est caractérisée par 4 éléments. Name those elements.

Answer 20

1. la direction : orientation de la force
2. le sens : vers où la force agit
3. La grandeur de la force, elle est
   mesurée en “Newton” (N)
4. Le point d’application : endroit où la
   force s’exerce