Oxford Cambridge and RSA
June 2023 only
GCSE (9–1) Physics A (Gateway Science)
J249 01/02/03/04
Equation Sheet
* 9 9 8 8 6 0 6 9 0 6 *
INSTRUCTIONS
• Do not send this Equation Sheet for marking. Keep it in the centre or recycle it.
INFORMATION
• This Equation Sheet is for the June 2023 examination series only.
• This Equation Sheet has 4 pages.
© OCR 2023 [601/8651/3]
DC (PQ) 327839/2
OCR is an exempt Charity
Turn over
© OCR 2023
J249 01/02/03/04
change in velocity
time
v–u
t
power =
work done
time
work done = force × distance (along the line of action of the force)
P=
W
t
W = Fs
p = mv
F = ma
force = mass × acceleration
HT momentum = mass × velocity
E = 2 m v2
1
v2 – u2 = 2 a s
a=
s = vt
kinetic energy = 2 × mass × (speed)2
1
(final velocity)2 – (initial velocity)2 = 2 × acceleration × distance
acceleration =
distance travelled = speed × time
P2 Forces
p = hρg
p V = constant
for a given mass of gas at a constant temperature:
pressure × volume = constant
HT pressure due to a column of liquid = height of column × density of liquid × gravitational field strength
E = ml
thermal energy for a change in state = mass × specific latent heat
V
ρ=m
ΔE = m c Δθ
mass
volume
change in thermal energy = mass × specific heat capacity × change in temperature
density =
P1 Matter
Key: HT = Higher Tier only
Equations in physics
2
© OCR 2023
J249 01/02/03/04
V = IR
E = QV
P = VI
P = I2 R
E = Pt
potential difference = current × resistance
energy transferred = charge × potential difference
power = potential difference × current
power = (current)2 × resistance
energy transferred = power × time
Vs
=
Turn over
Ns
Np
Vp
HT
potential difference across primary coil
number of turns in primary coil
=
potential difference across secondary coil
number of turns in secondary coil
F = BIl
HT force on a conductor (at right angles to a magnetic field) carrying a current:
force = magnetic flux density × current × length
P4 Magnetism and magnetic fields
Q = It
M = Fd
F
A
charge flow = current × time
P3 Electricity
moment of a force = force × distance (normal to direction of the force)
P=
E = mgh
gravitational potential energy = mass × gravitational field strength × height
force normal to a surface
area of that surface
W = mg
gravitational force = mass × gravitational field strength
pressure =
E = 2 k x2
1
F = kx
energy transferred in stretching = 2 × spring constant × (extension)2
1
force exerted by a spring = spring constant × extension
P2 Forces
3
© OCR 2023
useful output energy transfer
input energy transfer
J249 01/02/03/04
Vp Ip = Vs Is
v = fλ
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Oxford Cambridge and RSA
potential difference across primary coil × current in primary coil = potential difference across secondary coil × current in secondary coil
P8 Global challenges
efficiency =
P7 Energy
wave speed = frequency × wavelength
P5 Waves in matter
4