Chapter 8: Forces In Action Flashcards Preview

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Flashcards in Chapter 8: Forces In Action Deck (32):
1

No cantact force

When with no contact a object may move

2

Contact force

When one object makes contact with another

3

Gravity

A pulling down force. This is a non contact force

4

Permanent magnets

These keep their magnetic forces when away from other magnets

5

Temporary magnets

These lose their magnetism when away from other magnets

6

Repulsion

A force in which objects move away from each other

7

Attraction

A force in which objects are pulled closer together

8

Force

A push or pull in a particullar direction. they occur around us all the time. Exzamples are pushing a door open, pushing a handle or pulling open your locker

9

Magnetic fields

They are Areas where the magnetic force acts

10

Domains

Domains are little magnets that determin if a item will be magnetic or not

11

Non magnetic domains

The domains inside a object are facing different dirrections so they cancel each other out

12

Magnetic domains

Domains that face the same dirrection making the object magnetic

13

Electro magnet

A magnet that when is touched with electricity from a battery has its domains lineup

14

Atoms

Very small objects that make up things and the atoms match that item by having the sam ppe property

15

Neucleus

The inside cell that acts as a control point

16

Electrons

very light, negatively charged particles inside an atom . Electrons move around the central nucleus of an atom

17

Negative electric charge

A atom that more electrons than protons

18

Protons

Heavy but tiny objects in a necleus that have a positive electrical charge

19

Positive electrical charge

A atom that has fewer electrons than protons

20

Neutrons

Tiny but heavy particals in a necleus that has no electrical charge

21

Neutral

A object with a even amount of protons and electrons

22

Static electricity

The build up of energy in one place

23

Insulators

Materials that wont allow electricity to go through them

24

Conducters

Materials that allow electricity to go through them

25

Lightning rod

A conductive metal rod attached to buildings so the lightning hits the rod and not the building

26

Mass

The measure of the amount in a object

27

Wieght

A measure of the size of the gravity force pulling an object towards the centre of a massive body, such as the Earth. The weight of an object depends on the object’s mas

28

Newton

The unit for measuring forces

29

Air resistance

The force of the air pushing at a object through the air

30

Terminal speed

The constant speed reached by a falling body. A body reaches terminal speed when the force of gravity pulling it down is balanced by the air resistance pushing against it

31

Boyance

The force which keeps and object floating

32

Surface tension

The ‘firmness’ of the surface of a liquid created by the attraction between particles at the surface. The surface acts like an elastic skin