Energy And Charge

Question 1

What is a force

Answer 1

• 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

Question 2

How can a force be exerted on an object

Answer 2

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

Question 3

What is Paired forces

Answer 3

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

Question 4

Ehat types of forces do u get

Answer 4

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

Question 5

Examples of non contact forces

Answer 5

• gravitional
• magnectic
• electrostic

Question 6

Examples of contact forces

Answer 6

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

Question 7

What is gravitional force

Answer 7

• attract without touching

- the larger the mass of objects, the stronger the force of attraction

Question 8

What is the direction of gravitional attractive force

Answer 8

-towards the centre of the object

Question 9

What are the examples of objects that attract each other

Answer 9

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

Question 10

What is mass

Answer 10

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

Question 11

What is weight

Answer 11

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

Question 12

The moon attracts an astronaut

Answer 12

-six times more weakly than earth

Question 13

The mass of an object is constant everywhere

Answer 13

But its weight changes

Question 14

What is magnets force

Answer 14

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

Question 15

Facts

Answer 15

Steel contains irons

Question 16

What are ferromagnetic

Answer 16

-materials that are attracted by a magnet

Question 17

What are magnets

Answer 17

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

Question 18

The earth

Answer 18

• 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

Question 19

What does a atom consists of

Answer 19

• protons
• neutrons
• electrons

Question 20

What is electrostatic force

Answer 20

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

Question 21

What is postive charge

Answer 21

• objects released electrons

- will not move

Question 22

What is negtive charge

Answer 22

• object accepted electrons

- will move

Question 23

What are like charges

Answer 23

• repel eath other

- these are repulsive forces

Question 24

Ehat is un like charges

Answer 24

Attract each other

Are attractive forces

Question 25

What is the energy stored in cells

Answer 25

-potentional energy

Question 26

What is lighting

Answer 26

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

Question 27

What does a atom consists of

Answer 27

• protons
• neutrons
• electrons

Question 28

what is a neutral atom

Answer 28

-made of of equal amount of protons and electrons

eg li 3+ and -3

Question 29

what is the negtive force

Answer 29

• objects accepted electrons

- will move

Question 30

What is postive force

Answer 30

• objects released electrons

- will not move