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Flashcards in Energy And Charge Deck (30):
1

What is a force

- it is a push or a pull
-force is measured in newton (N)
-measured with a spring balance or a scale that is carlibrated in newton

2

How can a force be exerted on an object

-speeding up or slowing down
-deformation
-rotation
-direction can change
-object can come to stand still

3

What is Paired forces

Each object exerts a force of equal size on the other object

4

Ehat types of forces do u get

-non contact or flied forces
- work over a distance
-contact forces
-objects touches another object

5

Examples of non contact forces

-gravitional
-magnectic
-electrostic

6

Examples of contact forces

-mechanical force
-applied force
-friction force
- normal force
-tenion force or tenion
-air resistance
-elastic forces in spings

7

What is gravitional force

-attract without touching
- the larger the mass of objects, the stronger the force of attraction

8

What is the direction of gravitional attractive force

-towards the centre of the object

9

What are the examples of objects that attract each other

-the sun and planets
-earth amd moon
-earth and object on the earths surface

10

What is mass

- the object is indication of the amount of matter that object consists of ( kg )
- the mass of object remin constant

11

What is weight

-Is the atteactive force that the earth exerts on an object (N)
-the weight of objects change

12

The moon attracts an astronaut

-six times more weakly than earth

13

The mass of an object is constant everywhere

But its weight changes

14

What is magnets force

- it atttacts to objects that are constant in iron, nickel and cobalt
If it has that is it has magnectic propertises

15

Facts

Steel contains irons

16

What are ferromagnetic

-materials that are attracted by a magnet

17

What are magnets

-have north and south pole
-different poles attract
-same poles repel

18

The earth

-has a core of nickel and iron and acts as a massive magnet
-the magnetic field that is caused by the core has a north and south pole, where the magnetic forces are the strongest

19

What does a atom consists of

-protons
-neutrons
- electrons

20

What is electrostatic force

-the force that charged objects exert
-Also the forces between the particles
-push and pull

21

What is postive charge

- objects released electrons
-will not move

22

What is negtive charge

-object accepted electrons
-will move

23

What are like charges

-repel eath other
- these are repulsive forces

24

Ehat is un like charges

Attract each other
Are attractive forces

25

What is the energy stored in cells

-potentional energy

26

What is lighting

-particles and droplets in clouds rub and bump against each other

27

What does a atom consists of

-protons
-neutrons
-electrons

28

what is a neutral atom

-made of of equal amount of protons and electrons
eg li 3+ and -3

29

what is the negtive force

-objects accepted electrons
-will move

30

What is postive force

-objects released electrons
-will not move