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formulas Flashcards

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1
Q

What is the formula for weight, mass and gravity?

A

Weight(N) = mass(Kg) x gravitational field strength (N/Kg)

W = m x g

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2
Q

What is the formula for distance (along the line of action of the force), work done and force?

A

Work done = force x distance (along the line of action of the force)

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3
Q

What links power, work done and time?

A

Work done = power x time

W = P x t

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4
Q

What links time, current and charge?

A

Charge = current x time

Q = I x t

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5
Q

What links voltage, resistance and current?

A

Voltage = current x resistance

V = I x R

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6
Q

What links voltage, power and current?

A

Power = voltage x current

P = V x I

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7
Q

What links current, power and resistance?

A

Power = current squared x resistance

P = I squared x R

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8
Q

What links charge, energy transferred and voltage?

A

Energy transferred = charge x voltage?

E = Q x V

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9
Q

What links height, gravitational potential energy, mass and gravitational field strength

A

Gravitational potential energy = mass x gravitational field strength x height

Ep = m x g x h

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10
Q

What links momentum, velocity and mass?

A

Momentum = mass x velocity

p = m v

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11
Q

What links pressure due to a liquid, height, density of liquid and gravitation field strength?

A

Pressure of liquid = height x density of liquid x gravitational field strength

P = h x p x g

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12
Q

What links wavelength, speed and frequency?

A

Speed= frequency x wavelength

V= f x wavelength (lamda)

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13
Q

What links acceleration, initial and final velocity and time?

A

Acceleration = final velocity- initial / time

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14
Q

What links speed, time and distance?

A

Speed = distance over time

V = S/t

S= V x t

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15
Q

How to work out gradient?

A

Change in Y / change in X

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16
Q

How to work out average velocity?

A

(Inital + final) / 2

17
Q

What links power, speed and force?

A

Power = force x speed

18
Q

What links time period and frequency?

A

Frequency = 1/ time period

Time period = 1/ frequency

19
Q

How do you calculate average speed?

A

Total distance travelled / total time taken

20
Q

How do you calculate the pressure on solids?

A

Pressure (N/m^2) = force (N) / area (m^2)

21
Q

How do you calculate a moment?

A

Moment (Nm) = force (N) x distance from pivot (m)

22
Q

How do you calculate efficiency?

A 
Useful energy (or power) out/
Total energy (or power) in

(x100 to get a percentage)

23
Q

How to calculate mass, density and volume?

A

Mass = density x volume

Density = mass/volume

24
Q

What links latent heat, mass and thermal energy for a change of state

A

E = M x L

Thermal energy for a change of state = mass x latent heat

25
Q

What links change in thermal energy, specific heat capacity, mass and temperature change?

A

E = M x C x theta

Energy = mass x capacity x temperature

26
Q

What is the formula for kinetic energy?

A

Ek- kinetic energy
M- mass
V- speed

Ek = 1/2 x M x V squared

27
Q

What is the difference between dependent, independent and control variables?

A

Independent- what you change

Dependent- what you measure

Control- what you keep the same

28
Q

What links resultant force, mass and acceleration?

A

F = ma

29
Q

What links spring constant, extension and force applied to a string?

A

Force applied to a string = spring constant x extension

F = k e

30
Q

What links acceleration, initial velocity, distance and final velocity?

A

(Final velocity) squared - (initial velocity) squared = 2 x acceleration x distance

31
Q

What links change in momentum, force and time taken?

A

Force = change in momentum/ time taken

32
Q

What links elastic potential energy, extension and spring constant?

A

Elastic potential energy= 0.5 x spring constant x (extension) squared

33
Q

How to calculate magnification?

A

Image height / object height

34
Q

What links force on a conducted carrying a current, magnetic flux density, current and length?

A

Force on a conductor carrying a current = magnetic flux density x current x length

F = B x I x l

35
Q

What links voltage across primary coil, number of turns in primary coil, voltage across secondary coil and number of turns in secondary coil?

A

Voltage across primary coil / voltage across secondary coil

                                      =

Number of turns in primary coil / number of turns in secondary coil

36
Q

What links voltage across primary coil, current in secondary coil, voltage across secondary coil and current in primary coil?

A

Voltage across primary coil X current in Primary coil

                                       =

Voltage across secondary coil X current in secondary coil

37
Q

What links volume, pressure and constant (for gases)?

A

Constant = pressure x volume

p V = constant

Physics (11 decks)

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