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Physics Formula Revision (Conditions highlighted in red) [Draft Ver]
Topic
Formula
Distance
Time
Displacement
s
;v
Velocity 
Time
t
Diff. in Velocity
Acceleration 
Time
Speed 
2.1: Kinematics
SI unit
Distance (m)
Time (sec)
Final unit
m/s
Displacement (m)
Time (sec)
m/s
Velocity (m/s)
Time (sec)
m/s2
Force (N)
Mass (kg)
Acceleration (m/s2)
Mass (kg)
g = 10 N/kg
Mass (g/kg)
Volume (cm3/m3)
Newton (N)
Condition: Used only when acceleration is
constant.
2.2 Dynamics
Resultant Force  Mass  Acceleration
F  ma
W  mg
2.3 Mass Weight
Density
2.4 Turning Effect
of Forces
 (Density) 
m
;.
V
Moments  Fd
Newton metre
(Nm)
Liquids: Pressure  h  g
h (m): Depth of Liquid
 (kg/m3): Density of liquid
g: 10N/kg
P (Pa): Pressure
V (m3): Volume
N/m2 , Pa
F (N): Force
d (Perpendicular dist): m
m (kg): Mass
v (m/s): Velocity
J
m (kg): Mass
g: 10N/kg
h (m): Height
Energy change /Work done(J)
Time (s)
J
Theta: Unknown temperature
X0: “ice point”, X100: Steam pt
oC
Q(heat energy)  C
C: Heat capacity
J
Q  mc
J
Q  ml f
m: mass
c: Specific Heat Capacity
l f : Latent heat of fusion
Q  mlv
l v : Latent heat of vapourisation
J
1
T
v f
f: Frequency
t (sec): Time
Hz
Gases (when temp. is constant)
P1V1  P2V2
W (Work Done)  Fd
1
K.E.  Kinetic Energy   mv2
2
P.E.  Potential Energy   mgh
X P  Power  
3.2 Thermal
Properties of Matter

f 
4.1: General Wave
Properties
4.2: Light
N/m2 , Pa
A
2.5 Pressure
3.1 Principles of
Thermometry
g/cm3 or kg/m3
Force (N)
Perpendicular Distance (m)
Note: Perpendicular Distance is not always the length of the rod.
Force (N)
Force F
Solids: Pressure 

Area (m2)
Area
2.6 Energy, Work,
power
Newton (N)
W or Energy change
Time
X  X0
(For Celsius scale only)
X100  X0
NA
J
J/s, W (watt)
J
v (m/s): Velocity
m/s
 (m): Wavelength
f(1/t): Frequency
n = refractive index (ratio)
NA. Ratio.
Snell’s Law:
i/r (o): angle of
sin i
n
incidence/refraction
sin r
*Set calculator in degree mode.
Condition: The angle of incidence must be in the less dense medium; angle r must be in the
denser medium.
Physics Formula Sheet – Version 1.
Copyright © 2010. All Rights Reserved. No part of this publication may be reproduced without permission from the author.
4.2: Light
Ht of image
Real depth
c


n
v Apparent depth Ht of object
c  sin 1 n
5.1: Current
Electricity
I
Q
t

W
Q
V
W
Q
Ohm’s Law: V  IR
Condition: Only for ohmic conductors.
R
5.2: Practical
Electricity
l
A
5.3:
Electromagnetic
Induction
NA. Ratio.
I: Current (A)
Q: Charge (Columb)
t: Time (sec)
 : E.m.f. (Volts – V)
W: Work done/energy of circuit (J)
Q: Charge (Columb)
V: Potential Diff. (V)
W: Work done/energy across
circuit component
Q: Amount of charge
R: Resistance (  )
Coloumb, C
 : Resistivity (  m)

o
V, J/C
V, J/C
V
L: Length
A: Cross-sectional Area
E  VIt  I 2 RT 
P  VI  I 2 R 
c (m/s): Speed of light in vaccum
(3x108 m/s)
v (m/s): Speed of light in medium.
c (o): Critical angle.
V 2t
R
V2
R
J
P = Power
R = Resistance
Vs N s I p


Vp N p I s
Physics Formula Sheet – Version 1.
Copyright © 2010. All Rights Reserved. No part of this publication may be reproduced without permission from the author.
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