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GCSE Combined Physics (Edexcel) > Equations > Flashcards

Flashcards in Equations Deck (32)
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1

What is the equation that links distance travelled, average speed and time?

distance travelled = average speed × time

d = s x t

2

What is the equation that links acceleration, change in velocity and time taken?

acceleration = change in velocity ÷ time taken

a = (v – u)

t

3

What is the equation that links force, mass and acceleration?

force = mass × acceleration

F = m × a

4

What is the equation that links weight, mass and gravitational field strengh?

weight = mass × gravitational field strength

W = m × g

5

What is the equation that links momentum, mass and velocity? (Higher)

momentum = mass × velocity

p = m × v

6

What is the equation that links work done, force and distance moved in the direction of the force?

work done = force × distance moved in the direction of the force

E = F x d

7

What is the equation that connects kinetic energy, mass and velocity?

kinetic energy = ½ × mass × (velocity)2

    KE = ½ × m × v2

8

What is the equation for efficiency?

(useful energy transferred by the device)

 (total energy supplied to the device)

9

What is the equation that links gravitational potential energy, mass, gravitational field strength and change in vertical height?

gravitational potential energy = mass × gravitational field strength x change in vertical height

ΔGPE = m × g × Δh

10

What is the equation that links wave velocity, frequency and wavelength?

wave velocity = frequency x wavelength

v = f x λ

11

What is the equation that connects wave speed, distance and time?

wave speed = distance

                        time

v =  d

       t

12

What is the equation that connects power, work done and time taken?

power = work done ÷ time taken

P = E

       t 

13

What is the equation for moment of a force?

moment of a force = force × distance normal to the direction of the force

14

What is the equation that connects charge, current and time?

charge = current × time

Q = I x t

15

What is the equation that connects energy transferred, charge moved and potential difference?

energy transferred = charge moved × potential difference

E = Q × V

16

What is the equation that connects potential difference, current and resistance?

potential difference = current × resistance

V = I x R

17

What is the equation that connects electrical power, current and potential difference?

electrical power = current × potential difference

P = I x V

18

What is the equation that connects electrical power, current and resistance?

electrical power = current squared × resistance

P = I2 x R

19

What is the equation that links density, mass and volume?

density = mass ÷ volume

ρ = m

      V

20

What is the equation that links force exerted on a spring, spring constant and extension?

force exerted on a spring = spring constant × extension

F = k × x

21

What is the equation that links pressure, force normal to a surface and area of surface?

pressure = force normal to surface ÷ area of surface

P  = F

       A

22

What is the equation that links final velocity, initial velocity, acceleration and distance?

(final velocity)2 – (initial velocity)2 = 2 × acceleration × distance

v2 – u2 = 2 × a × x

23

What is the equation that links force, change in momentum and time? (Higher)

force = change in momentum ÷ time

    F = (mv – mu)

          t

24

What is the equation that links energy transferred, current, potential difference and time?

energy transferred = current × potential difference × time

E = I x V x t

25

What is the equation that connects force on conductor at right angle to a magnetic field carrying a current, magnetic flux density, current and length? (Higher)

force on conductor at right angle to a magnetic field carrying a current = magnetic flux density × current × length

F = B × I × L

 

26

Voltage across primary coil      = ?

Voltage across secondary coil

voltage across primary coil        =       number of turns in primary coil

voltage across secondary coil          number of turns in secondary

Vp =  Np

Vs      Ns

27

(pd  × current) in primary coil = ?

(pd  × current) in primary coil = (pd × current) in secondary coil

Vp × Ip = Vs × Is

28

What is the equation that connects change in thermal energy, mass, specific heat capacty and change in temperature?

change in thermal energy = mass × specific heat capacity × change in temperature

ΔQ = m × c × Δθ

29

What is the equation that links thermal energy for a change of state, mass and specific latent heat?

thermal energy for a change of state = mass × specific latent heat

Q = m × L

30

How do you calculate pressure or volume for gases of fixed mass at a constant temperature?

P1 x V1 = P2 x V2