Forces

Question 1

Name all 5 contact forces

Answer 1

Frictional force
Normal force
Tension force
Compression force
Muscular force

Question 2

Name all 3 non-contact forces

Answer 2

Gravitational force
Electrostatic force
Magnetic force

Question 3

What is a force?

Answer 3

A push or pull on an object due to its interaction with another object

Question 4

What unit is force measured in?

Answer 4

Newtons (N)

Question 5

What is a springbalance?

Answer 5

A simple device consisting of a spring which, when stretched, gives a reading of the force used to stretch the spring

Question 6

What does the length of the arrow represent?

Answer 6

The size of the force

Question 7

What does the arrowhead tell us?

Answer 7

The direction of the force

Question 8

Who was Sir Isaac Newton?

Answer 8

A famous physicist who was most well-known for formulating the laws of motion

Question 9

A force is a ______ quantity

Answer 9

physical

Question 10

These types of physical quantities are called ________

Answer 10

Vectors

Question 11

Direction can be given as _______ points (e.g. North, South, South East etc.) or as a______ .

Answer 11

cardinal
bearing

Question 12

How is bearing measured?

Answer 12

It is measured from North in a clockwise direction.

Question 13

Name the four effects of a force?

Answer 13

1. Change the shape of an object
2. Change the direction in which the object is moving
3. Change the motion of an object -Stop/Start
4. Change the speed of an already moving object

Question 14

What is Isaac Newtons law?

Answer 14

For every action there is an equal but opposite reaction.

Question 15

The effects of different forces acting together depend on what?

Answer 15

the size of each force and in what direction each force is acting in

Question 16

What is a Contact force?

Answer 16

A force that results when two objects are physically touching each other.

Question 17

What is a non-contact force?

Answer 17

A force that can act over a distance. (the 2 objects have an effect on each other even when they are not touching each other)

Question 18

What is a friction force?

Answer 18

The resistance that one surface/object experiences when moving over another surface/object, or through a substance. (liquid/gas)

Question 19

The force that opposes motion is called…

Answer 19

friction

Question 20

Friction acts in the same/opposite direction to the motion of an object.

Answer 20

opposite

Question 21

Friction is … to the surface that the body is on

Answer 21

parallel

Question 22

What is the normal force?

Answer 22

A contact force that prevents you from penetrating the ground.

Question 23

In what direction does the normal force always act to the surface that the object is resting on?

Answer 23

perpendicular

Question 24

What does the size of a frictional force depend on?

Answer 24

1. The type of surface on which an object is moving
2. The normal force

Question 25

The smoother the surface the less/more friction there is

Answer 25

less

Question 26

Name 2 advantages of friction forces?

Answer 26

1. Friction between the tread of the tyre and the road prevents cars from skidding 2.Friction between our feet and the ground enables us to move forward without slipping

Question 27

Tension force

Answer 27

Two forces acting on one object in opposite directions to stretch the object or pull it apart.

Question 28

Compression force

Answer 28

To forces acting on one object in opposite directions (towards each other) to compress or deform the object.

Question 29

Muscular force

Answer 29

A force applied by a person or an object.

Question 30

Gravitational force

Answer 30

A force of attraction between two objects/bodies over a distance due to their masses.

Question 31

The greater the mass of an object the weaker/stronger the gravitational force of attraction between them is

Answer 31

stronger

Question 32

The closer the objects are to each other the stronger/weaker the gravitational force of attraction between them is

Answer 32

stronger

Question 33

weight

Answer 33

the gravitational force exerted on the object by the earth/any other planet

Question 34

mass

Answer 34

the amount of matter that an object consists of

Question 35

What is mass measured in?

Answer 35

(Kg) Kilograms

Question 36

What is weight measured in?

Answer 36

(N) Newtons

Question 37

The mass of an object is perpetual/varies depending on where it is measured

Answer 37

perpetual

Question 38

The weight of an object is perpetual/varies depending on where it is measured

Answer 38

varies

Question 39

Gravitational acceleration

Answer 39

The Earths gravitational force causing everything to accelerate to its core.

Question 40

(g) means

Answer 40

gravitational acceleration

Question 41

(m) means

Answer 41

mass

Question 42

(Fg) means

Answer 42

Weight

Question 43

The unit for measuring gravitational acceleration is ...

Answer 43

9,8m/s²

Question 44

Formula for calculating weight:

Answer 44

Fg = m x g

Question 45

Magnetic Force

Answer 45

A force that two magnetic materials exert on each other over a distance

Question 46

Magnets

Answer 46

Materials that have a strong magnetic field

Question 47

Name 3 magnetic materials:

Answer 47

Nickel,cobalt and iron (NIC)

Question 48

What are alloys?

Answer 48

A mixture of two or more metals

Question 49

Give 1 example of an alloy

Answer 49

Steel

Question 50

Name 5 things that magnets all have in common :

Answer 50

Every magnet has: 1. A magnetic field around them 2. Two magnetic poles: South (S) and North (N) 3. Opposite poles attract each other 4. Like poles repel each other 5. If a magnet is allowed to flow freely(like a compass) it will turn and come to rest its North pole to the geographic North Pole of the Earth

Question 51

What is a magnetic field?

Answer 51

The space around a magnet in which it can attract or repel another object

Question 52

Magnetic field lines are always drawn from 1... pole to 2... pole

Answer 52

1. North 2. South

Question 53

The more lines drawn and the closer the field lines are together, the weaker/stronger the force is.

Answer 53

stronger

Question 54

The further you get away from the magnet the stronger/weaker the magnetic field gets

Answer 54

weaker

Question 55

What are the Northern lights called?

Answer 55

Aurora borealis

Question 56

What are the Southern lights called?

Answer 56

Aurora australis

Question 57

When is the beauty of the Northern and Southern lights created?

Answer 57

When charged particles from the sun spiral along the magnetic field lines and enter the Earth's atmosphere at the poles, where they interact with the atmospheric gas particles, causing a light show.

Question 58

Electrostatic force

Answer 58

A force that two electrically charged objects exert on each other over a distance.

Question 59

What happens to the electrons when two neutral objects are rubbed together?

Answer 59

They are transferred from one of the objects to the other as a result of friction.

Question 60

What happens to the protons when two neutral objects are rubbed together?

Answer 60

The protons are held tightly in the nucleus of the atom with a strong force.

Question 61

When an object loses electrons, it will have more protons than electrons. This is called a ... charged object charge.

Answer 61

positively

Question 62

When an object gains electrons, it will have more electrons than protons. This is called a ... charged object charge.

Answer 62

negatively

Question 63

Lightning

Answer 63

The build up and discharged of electrons in certain areas of the cloud caused by friction from air,dust and water particles rubbing against each other inside the cloud.