Edexcel PHYSICS IGCSE EQUATIONS
Section 5: Solids, liquids and gases
Equations to Learn
Section 2: Electricity
density =
mass
volume
Equations to Learn
Section 1: Forces and motion
pressure =
P =I×V
distance moved
time taken
change in velocity
acceleration =
time taken
(v − u)
a=
t
force = mass × acceleration
voltage = current × resistance
Equations to Learn
charge = current × time
efficiency =
Q=I×t
pressure difference = height × density × g
useful energy output
total energy input
W=F×d
energy transferred = current × voltage × time
gravitational potential energy = mass × g × height
E=I×V×t
GPE = m × g × h
W=m×g
1
kinetic energy = × mass × speed2
2
𝐦𝐨𝐦𝐞𝐧𝐭𝐮𝐦 = 𝐦𝐚𝐬𝐬 × 𝐯𝐞𝐥𝐨𝐜𝐢𝐭𝐲
p=h×ρ×g
Section 3: Waves
moment = force × perpendicular distance
from the pivot
Equations to Learn
Equations given in the exam
wave speed = frequency × wavelength
Equations given in the exam
pressure × volume = constant
p1 × V1 = p2 × V2
𝐩𝐫𝐞𝐬𝐬𝐮𝐫𝐞
= 𝐜𝐨𝐧𝐬𝐭𝐚𝐧𝐭
𝐭𝐞𝐦𝐩𝐞𝐫𝐚𝐭𝐮𝐫𝐞
𝐩𝟏 𝐩𝟐
=
𝐓𝟏 𝐓𝟐
1
KE = × m × v 2
2
𝐩 =𝐦×𝐯
energy transferred = work done
2 × π × orbital radius
orbital speed =
time period
𝐜𝐡𝐚𝐧𝐠𝐞 𝐢𝐧 𝐦𝐨𝐦𝐞𝐧𝐭𝐮𝐦
𝐟𝐨𝐫𝐜𝐞 =
𝐭𝐢𝐦𝐞 𝐭𝐚𝐤𝐞𝐧
F
A
work done = force × distance moved
Equations given in the exam
weight = mass × gravitational field strength
2×π×r
T
p=
force
area
Section 4: Energy Resources & Energy Transfer
V=I×R
F=m × a
v=
m
V
power = current × voltage
Equations to Learn
average speed =
ρ=
v=f×λ
refractive index,
sin C =
Equations given in the exam
Power =
sin i
n=
sin r
Work done
Energy Transferred
=
time taken
time taken
W
P=
t
1
n
Section 6: Magnetism & Electromagnetism
Equations to Learn
𝐢𝐧𝐩𝐮𝐭 (𝐩𝐫𝐢𝐦𝐚𝐫𝐲)𝐯𝐨𝐥𝐭𝐚𝐠𝐞
𝐩𝐫𝐢𝐦𝐚𝐫𝐲 𝐭𝐮𝐫𝐧𝐬
=
𝐨𝐮𝐭𝐩𝐮𝐭 (𝐬𝐞𝐜𝐨𝐧𝐝𝐚𝐫𝐲)𝐯𝐨𝐥𝐭𝐚𝐠𝐞 𝐬𝐞𝐜𝐨𝐧𝐝𝐚𝐫𝐲 𝐭𝐮𝐫𝐧𝐬
𝐕𝐏 𝐍𝐏
=
𝐕𝐒 𝐍𝐒
Equations given in the exam
𝐢𝐧𝐩𝐮𝐭 𝐩𝐨𝐰𝐞𝐫 = 𝐨𝐮𝐭𝐩𝐮𝐭 𝐩𝐨𝐰𝐞𝐫
1
frequency =
time period
f=
𝐕𝐏 × 𝐈𝐏 = 𝐕𝐒 × 𝐈𝐒
1
T
for 100% efficiency
Section 7: Radioactivity and particles
Equations in bold are triple award only
No equations in this section