Trilogy combined Physics

Question 1

Weight =

Answer 1

mass x gravitational field strength

m x g

Question 2

Work done (W) =

Answer 2

force x distance

F x s

Question 3

Force applied to a spring (F) =

Answer 3

spring constant x extension

k x e

Question 4

Distance travelled (s) =

Answer 4

speed x time

s = v x t

Question 5

Acceleration (a) =

Answer 5

change in velocity / time

Question 6

Resultant force (F) =

Answer 6

mass x acceleration

m x a

Question 7

Kinetic energy (Ek) =

Answer 7

1/2 x mass x (speed squared)

1/2 x m x v^2

Question 8

Gravitational potential energy (Ep) =

Answer 8

mass x gravitational field strength x height

m x g x h

Question 9

Power (P) =

Answer 9

energy transferred / time or word done/time

E / t or W / t

Question 10

energy efficiency =

Answer 10

useful energy transferred out / total energy in

Question 11

power efficiency

Answer 11

useful power output / total power input

Question 12

wave speed (v) =

Answer 12

frequency x wavelength

f x wavelength

Question 13

Unit for energy is

Answer 13

Joules (J)

Question 14

The standard unit for mass is

Answer 14

kilograms (kg)

Question 15

The standard unit for gravitational field strength is

Answer 15

newtons per kilogram or N/kg

Question 16

How does height affect an object’s Ep? (gravitational potential energy)

Answer 16

The higher the object, the more Ep it has

Question 17

How does mass affect an object’s Ep? (gravitational potential energy)

Answer 17

The heavier an object, the more Ep it has

Question 18

How does mass affect an object’s Ek? (kinetic energy)

Answer 18

The heavier an object, the more Ek it has

Question 19

How does velocity affect an object’s Ek? (kinetic energy)

Answer 19

The faster an object, the more Ek it has

Question 20

Energy cannot be created or destroyed, but it can be…

Answer 20

transferred, stored or dissipated

Question 21

Energy can be transferred, stored or dissipated, but it cannot be…

Answer 21

created or destroyed

Question 22

What are the most common ways in which energy is wasted during a transfer?

Answer 22

sound or heat

Question 23

Differences between scalar and vector quantities

Answer 23

Scalar quantities have magnitude only, vector quantities have magnitude and direction

Question 24

Examples of contact forces

Answer 24

friction
air resistance
tension
contact

Question 25

What do these forces have in common: friction, air resistance, tension, contact

Answer 25

Contact forces, the objects have to be physically touching

Question 26

Examples of non-contact forces

Answer 26

gravitational force | electrostatic force, magnetic force

Question 27

What do these forces have in common: gravitational, electrostatic and magnetic

Answer 27

non-contact forces, objects are physically separated

Question 28

Units for Force

Answer 28

Newtons (N)

Question 29

How to convert mass into weight on Earth (g=10N/kg)

Answer 29

Mass x 10 = Weight

Question 30

How to convert weight into force on Earth (g=10N/kg)

Answer 30

Weight / 10 = Mass

Question 31

Name an item of lab equipment which can be used to measure weight

Answer 31

calibrated spring balance (newtonmeter)

Question 32

What is a resultant force?

Answer 32

The overall force that takes into account all the forces acting on an object

Question 33

The name for the overall force that takes into account all the forces acting on an object

Answer 33

Resultant force

Question 34

Work done against friction causes a rise in...

Answer 34

the temperature of the object

Question 35

The extension of an object like a spring is directly proportional to the force applied, unless...

Answer 35

the limit of proportionality is exceeded

Question 36

As long as the limit of proportionality is not exceeded...

Answer 36

the extension of a sprint is directly proportional to the force applied

Question 37

Difference between distance and displacement

Answer 37

Distance is how far an object moves but does not include direction Displacement (a vector) is the distance an object moves if you measure it in a straight line from the start to the finish

Question 38

What does distance and speed have in common?

Answer 38

They're both scalar quantities

Question 39

What does displacement and velocity have in common?

Answer 39

They're both vector quantities

Question 40

On a distance/time graph, the gradient of the line represents

Answer 40

velocity

Question 41

On a distance/time graph, a straight line sloping upwards or downwards represents

Answer 41

a steady speed

Question 42

On a distance/time graph, a curve going up represents

Answer 42

acceleration

Question 43

On a distance/time graph, a horizontal line represents

Answer 43

a stationary object

Question 44

On a velocity/time graph, the gradient represents

Answer 44

acceleration

Question 45

On a velocity/time graph, a horizontal line represents

Answer 45

a constant velocity

Question 46

On a distance/time graph, not moving is represented with

Answer 46

a horizontal line

Question 47

On a velocity/time graph, a steady velocity is represented by

Answer 47

a horizontal line

Question 48

Newton't First Law of Motion states that if forces acting on an object are balanced

Answer 48

a stationary object will stay stay stationary and a moving object will stay at a constant velocity

Question 49

Newton's First Law of Motion states that if a stationary object stays stationary, the forces acting on it must be...

Answer 49

balanced

Question 50

Newton's First Law of Motion states that if a moving object is at a constant velocity, the forces acting on it must be

Answer 50

unbalanced

Question 51

If forces are balanced, the resultant force =

Answer 51

0

Question 52

The equation that represents Newton's second law is...

Answer 52

Resultant force = mass x acceleration

Question 53

Newton's Third Law of Motion states

Answer 53

when two objects interact, the forces acting on them are equal and opposite

Question 54

The stopping distance of a vehicle can be calculated by the sum of

Answer 54

thinking distance + braking distance

Question 55

The thinking distance is

Answer 55

the distance the vehicle travels while the driver is reacting

Question 56

The distance the vehicle travels while the driver is reacting is known as

Answer 56

the thinking distance

Question 57

The braking distance is

Answer 57

the distance the vehicle travels under the braking force

Question 58

The distance the vehicle travels under the braking force is known as

Answer 58

the braking distance

Question 59

A vehicle's thinking distance is affected by

Answer 59

tiredness, drugs and alcohol

Question 60

What component of a vehicle's stopping distance is affected by tiredness, drugs and alcohol?

Answer 60

Thinking distance

Question 61

A vehicle's braking distance is affected by

Answer 61

poor weather and the condition of the vehicle

Question 62

What component of a vehicle's stopping distance is affected by poor weather and the condition of the vehicle?

Answer 62

Braking distance

Question 63

Ripples on water are an example of

Answer 63

transverse waves

Question 64

Sound waves travelling through air are

Answer 64

longitudinal waves

Question 65

The amplitude of a wave is represented as

Answer 65

the maximum displacement of a point on a wave from the centre, undisturbed position

Question 66

The wavelength of a wave is represented by

Answer 66

the distance from a point on one wave to the equivalent point on the next wave

Question 67

The frequency of a wave is

Answer 67

the number of waves passing a point each second

Question 68

The maximum displacement of a point on a wave from the centre, undisturbed position

Answer 68

Amplitude

Question 69

The distance from a point on one wave to the equivalent point on the next wave

Answer 69

Wavelength

Question 70

The number of waves passing a point each second

Answer 70

Frequency

Question 71

Unit of frequency

Answer 71

Hertz (Hz)

Question 72

What kind of waves are electromagnetic waves?

Answer 72

Transverse

Question 73

How are waves in the electromagnetic spectrum organised?

Answer 73

According to their wavelength and frequency

Question 74

List the electromagnetic waves in order of wavelength (shortest to longest)

Answer 74

``` Gamma X UV Visible light Infrared Microwaves Radio ```

Question 75

List the electromagnetic waves in order of wavelength (longest to shortest)

Answer 75

``` Radio Microwaves Infrared Visible light UV X Gamma ```

Question 76

Which EM waves are used for television and radio?

Answer 76

Radio waves

Question 77

Which EM waves are used for satellite communication and cooking food?

Answer 77

Microwaves

Question 78

Which EM waves are used for heaters, cooking food and thermal imagingcameras?

Answer 78

Infra-red

Question 79

Which EM waves are used for fibre optic communication?

Answer 79

Visible light

Question 80

Which EM waves are used for energy efficient bulbs and tanning beds?

Answer 80

Ultraviolet (UV)

Question 81

Which EM waves are used for medical imaging and treatments?

Answer 81

X rays and gamma rays

Question 82

What are radio waves used for?

Answer 82

Television and radio

Question 83

What are microwaves used for?

Answer 83

Satellite communication | Cooking food

Question 84

What are infrared waves used for?

Answer 84

electrical heaters cooking food thermal imaging cameras

Question 85

What type of communication is visible light used for?

Answer 85

fibre optics

Question 86

What are UV rays used for?

Answer 86

energy efficient lamps | tanning beds

Question 87

What are x rays and gamma rays used for?

Answer 87

Medical imaging and treatments