# Unit 1 - Physics On The Go Flashcards Preview

## Physics AS Edexcel > Unit 1 - Physics On The Go > Flashcards

Flashcards in Unit 1 - Physics On The Go Deck (59)
1
Q

What is the formula for strain?

A
```Strain = x/L
Strain = extension/original length```
2
Q

What is the formula for stress?

A

Stress = force / area

σ = F/A

3
Q

Why is the formula for the Young’s modulus?

A

Stress/strain

4
Q

On a load extension graph, what represents the strain energy?

A

The area under the graph represents strain energy

5
Q

What is an electron volt?

A

When an electron is accelerated through a potential difference of 1v, it’s change in kinetic energy is 1eV

6
Q

What is the unit of energy?

A

A Joule

7
Q

What is the unit of power?

A

A Watt, representing 1 joule per second

8
Q

What is power?

A

Work done over time, measures in watts, 1 watt is 1 joule per second

9
Q

What are the SI base units?

A
```Mass: kilogram: kg
Time: second: s
Length: metre: m
Electrical current: ampere: A
Temperature: kelvin: K
Amount of substance: mole: mol
Luminous intensity: candela: cd```
10
Q

What is force in base units?

A

Newtons = kilogram x metre x second^-2

N = kgms^-2

11
Q

What is the gradient on a displacement time graph?

A

Displacement / time = velocity

12
Q

What is energy in base units?

A

Joule = kilogram x metre^2 x second^-2

J = kgm^2s^-2

13
Q

What is power in base units?

A

Watt = kilogram x metre^2 x second^-3

W = kgm^2s^-3

14
Q

What is frequency in base units?

A

Hertz = second^-1

Hz = s^-1

15
Q

What is charge in base units?

A

Coulomb = amp x second

C = As

16
Q

What is voltage in base units?

A

Volt = kilogram x meter^2 x second^-3 x amp^-1

V=kgm^2s^-3A^-1

17
Q

What is resistance in base units?

A

Ohm = kilogram x meter^2 x second^-3 x amp^-2

Ω = kgm^2s^-3A^-2

18
Q

What is the formula for strain?

A

Strain = change in length / length

ε = Δl/l

19
Q

What factor is a deca-?

A

10^1

20
Q

What factor is a hecto-?

A

10^2

21
Q

What factor is a kilo-?

A

10^3

22
Q

What factor is a mega-?

A

10^6

23
Q

What factor is a giga-?

A

10^9

24
Q

What factor is a tera-?

A

10^12

25
Q

What factor is a peta-?

A

10^15

26
Q

What factor is a deci-?

A

10^-1

27
Q

What factor is a centi-?

A

10^-2

28
Q

What factor is a micro-?

A

10^-6

29
Q

What is the vector of speed?

A

Velocity

30
Q

What is the vector of distance?

A

Displacement

31
Q

What is the scalar of velocity?

A

Speed

32
Q

What is the scalar of displacement?

A

Distance

33
Q

What is the gradient of a velocity-time graph?

A

Velocity / time = acceleration

34
Q

What is the area under a velocity-time graph?

A

Velocity x time = distance travelled

35
Q

What is the gradient of a distance-time graph?

A

Distance / time = speed

36
Q

What factor is nano-?

A

10^-9

37
Q

What factor is pico-?

A

10^-12

38
Q

What factor is femto-?

A

10^-15

39
Q

What is the formula for velocity?

A

Velocity = displacement / time

40
Q

What is formula for speed?

A

Speed = distance / time

41
Q

What is a scalar quantity?

A

A quantity that has a magnitude only

42
Q

What is a vector quantity?

A

A quantity that has magnitude and direction

43
Q

What is the formula for average speed?

A

Average speed = total distance / total time

44
Q

What is instantaneous speed?

A

The speed at any particular instant, can be found from the gradient of a tangent on a distance-time graph

45
Q

What is the formula for acceleration?

A

Acceleration = change in velocity / time to change

a = Δv/Δt

Acceleration = (final velocity - initial velocity) / time

a=(v-u)/t

46
Q

What is the gradient on a velocity-time graph?

A

Change in velocity / change in time = acceleration

(delta)v/(delta)t = a

47
Q

What is the area under a velocity-time graph?

A

Velocity x time = distance

48
Q

What is Newton’s first law of motion?

A

An object will remain in equilibrium unless acted upon by a resultant force

49
Q

What is Newton’s second law of motion?

A

If a resultant force acts on an object, it is proportional the the acceleration if the mass remains constant

Force = mass x acceleration

F=ma

50
Q

What is Newton’s third law?

A

Every action has an equal and opposite reaction

```Forces:
Are equal
Act in opposite direction
Are the same type of force
Act on different bodies```
51
Q

Which SUVAT doesn’t contain s?

A

v=u+at

Final velocity = initial velocity + acceleration x time

52
Q

Which SUVAT doesn’t contain a?

A

s=((u+v)/2) x t

Displacement = ((initial velocity + final velocity)/2) x time

53
Q

What does SUVAT stand for?

A
```S= displacement (metres)
U= initial velocity (metres per second)
V= final velocity (metres per second)
A= acceleration (metres per second per second)
T= time (seconds)```
54
Q

Which SUVAT doesn’t use v?

A

s=ut+(1/2)at^2

Displacement = initial velocity x time + 1/2 acceleration x time^2

55
Q

Which SUVAT doesn’t use t?

A

v^2 = u^2 +2as

Final velocity^2 = initial velocity^2 + 2 x acceleration x time

56
Q

What is the formula for density?

A

p=m/V

Density = mass/volume

57
Q

What properties must a stationary interference pattern have?

A

Both waves must have the same frequency and as such a constant phase difference

58
Q

What is uniform motion?

A

Motion without acceleration

59
Q

What is the formula for kinetic energy?

A

E(k)=1/2mv^2

Kinetic energy = 1/2 x mass x velocity^2