Unit 1 - Physics On The Go Flashcards Preview

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

What is the formula for strain?

Strain = x/L
Strain = extension/original length

2

What is the formula for stress?

Stress = force / area

σ = F/A

3

Why is the formula for the Young's modulus?

Stress/strain

4

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

The area under the graph represents strain energy

5

What is an electron volt?

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

6

What is the unit of energy?

A Joule

7

What is the unit of power?

A Watt, representing 1 joule per second

8

What is power?

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

9

What are the SI base units?

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

What is force in base units?

Newtons = kilogram x metre x second^-2

N = kgms^-2

11

What is the gradient on a displacement time graph?

Displacement / time = velocity

12

What is energy in base units?

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

J = kgm^2s^-2

13

What is power in base units?

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

W = kgm^2s^-3

14

What is frequency in base units?

Hertz = second^-1

Hz = s^-1

15

What is charge in base units?

Coulomb = amp x second

C = As

16

What is voltage in base units?

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

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

17

What is resistance in base units?

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

Ω = kgm^2s^-3A^-2

18

What is the formula for strain?

Strain = change in length / length

ε = Δl/l

19

What factor is a deca-?

10^1

20

What factor is a hecto-?

10^2

21

What factor is a kilo-?

10^3

22

What factor is a mega-?

10^6

23

What factor is a giga-?

10^9

24

What factor is a tera-?

10^12

25

What factor is a peta-?

10^15

26

What factor is a deci-?

10^-1

27

What factor is a centi-?

10^-2

28

What factor is a micro-?

10^-6

29

What is the vector of speed?

Velocity

30

What is the vector of distance?

Displacement