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Physics > Required Equations and units > Flashcards

Required Equations and units Flashcards

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1
Q

what is the equation to find weight?

A

weight = mass X gravitational field strength

W=mg

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2
Q

what is work done?

A

work done = force X distance (along line of action of the force)
W=Fs

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3
Q

what is the force applied to a spring?

A

force = spring constant X extension

F=ke

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4
Q

what is the moment of a force?

A

moment = force X distance(normal to direction of force)

M=Fd

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5
Q

what is pressure?

A

pressure= force normal to surface/ area of surface

p=F/A

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6
Q

what is the equation for distance travelled?

A

distance travelled=speed X time

s=vt

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7
Q

what is acceleration?

A

acceleration = change in velocity/ time taken

a=Δv/t

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8
Q

what is the equation for resultant force?

A

resultant force = mass X acceleration

F=ma

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9
Q

what is momentum?

A

momentum = mass X velocity

p=mv

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10
Q

what is kinetic energy?

A

kinetic energy = 0.5 X mass X (speed)²

Ek=1/2 m v²

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11
Q

what is gravitational potential energy?

A

gravitational potential energy = mass X gravitational field strength X height
Ep=mgh

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12
Q

what is power in terms of energy transferred?

A

power= energy transferred/time

P=E/t

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13
Q

what is power in terms of work done?

A

power = work done/time

P=W/t

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14
Q

what is efficiency in terms of energy transferred?

A

efficiency = useful output energy transferred/ total input energy transferred

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15
Q

what is efficiency in terms of power?

A

efficiency = useful power input/ total power input

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16
Q

what is wave speed?

A

wave speed = frequency X wavelength

v= fλ

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17
Q

what is charge flow?

A

charge = current X time

Q=It

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18
Q

what is potential difference?

A

potential difference = current X resistance

V=Ir

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19
Q

what is power in terms of potential difference?

A

power = potential difference X current

P=VI

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20
Q

what is power in terms of resistance?

A

power = current² X resistance

P=I² R

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21
Q

what is energy transferred in terms of power?

A

energy transferred = power X time

E=Pt

22
Q

what is energy transferred in terms of pd and charge?

A

energy transferred = charge flow X potential difference

E=QV

23
Q

what is density?

A

density = mass/volume

ρ =m/v

24
Q

what is the unit for weight?

A

newtons

N

25
Q

what is the unit for mass?

A

kilograms

Kg

26
Q

what is the unit for gravitational field strength?

A

newtons per kilogram

N/Kg

27
Q

what is the unit for work done?

A

Joule

J

28
Q

what is the unit for force?

A

newton

N

29
Q

what is the unit for distance?

A

metre

m

30
Q

what is the unit for spring constant?

A

newtons per metre

N/m

31
Q

what is the unit for extension?

A

metre

m

32
Q

what is the unit for pressure?

A

pascal

Pa

33
Q

what is the unit for area?

A

metre squared

m²

34
Q

what is the unit for distance travelled?

A

metre

m

35
Q

what is the unit for speed?

A

metres per second

m/s

36
Q

what is the unit for time?

A

second

s

37
Q

what is the unit for acceleration?

A

metres/second squared

m/s²

38
Q

what is the unit for velocity?

A

metres/second

m/s

39
Q

what is the unit for momentum?

A

kilogram metres per second

Kg m/s

40
Q

what is the unit for power?

A

watt

W

41
Q

what is the unit for wave speed?

A

metres/ second

m/s

42
Q

what is the unit for frequency?

A

hertz

Hz

43
Q

what is the unit for wavelength?

A

metre

m

44
Q

what is the unit for charge?

A

coulomb

C

45
Q

what is the unit for current?

A

ampere

A

46
Q

what is the unit for potential difference?

A

volt

V

47
Q

what is the unit for resistance?

A

ohm

Ω

48
Q

what is the unit for density?

A

kilograms per metre cubed

Kg/m³

49
Q

what is the unit for volume?

A

metre cubed

m³

50
Q

what is the unit for energy?

A

joule

J

Physics (11 decks)

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