GAMSAT Physics Equation Lists (Formulas and Topics)
  • Memorising GAMSAT physics equations does not replace understanding. Strong science reasoning may negate the need to memorise. However, the GAMSAT physics equations that we have listed can sometimes provide shortcuts when problem solving.
  • alpha: α mu: μ delta: Δ
    If you don't see the highlighted Greek symbols above then the physics equations or formulas below will not make sense; thus adjust fonts on your browser to Unicode. Besides the formulas on this page, we have also recently added a GAMSAT physics syllabus (topic list).
  • Please note: ACER announced in 2011 that calculators will no longer be permitted for GAMSAT Section 3. For this reason, we have created a separate page with useful tips and formulas related to GAMSAT Physics and Section 3 in order to help you develop math skills: Free GAMSAT Maths Tips and Formulas.
  • We have placed some GAMSAT Physics practice questions with worked solutions here: GAMSAT Physics Sample Questions

GAMSAT Physics Equation List (formulas) and practice problems in dimensional analysis

Memorise These!

Momentum, Impulse
PHY 4.3
M = mv  
Energy (conservation)
PHY 5.5
ET = Ek + Ep  
Work, Power
PHY 5.7
P = ΔW/Δt  
Current
PHY 10.1
I = Q/t  
Resistors (series, par.)
PHY 10.2
Req = R1 + R2 . . . 1/ Req = 1/ R1 +1/ R2 . . .
Capacitors (series, par.)
PHY 10.4
1/ Ceq = 1/ C1 +1/ C2 . . . Ceq = C1 + C2 . . .
Kirchoff's Laws
PHY 10.3.1
Σi = 0 at a junction ΣΔV = 0 in a loop
Torque forces
PHY 4.1
L1 = F1× r1 (CCW + ve) L2 = F2 × r2 (CW -ve)
Torque force at EQ
PHY 4.1
ΣFx = 0 and ΣFy = 0 ΣL = 0
Force
PHY 2.2
F = ma  
Weight
PHY 2.1
W = mg  
Pressure
PHY 6.1.2
P = F/A  
Buoyant Force
PHY 6.1.1
ρ = mass / volume Fb= Vρg = mg 
Optics
PHY 11.3
M = magnification = - i/o  

Memorise as Pairs

F = KG ( m1 m2 / r2 )
PHY 2.4 and 9.1.2
F = k ( q1 q2 / r2 ) Intensity = power/area ∝ 1 / r2
PHY 8.3
V = IR
PHY 10.1 and 10.5
P = IV Paired Use
vav = Δ d / Δ t
PHY. 1.4.1
aav = Δ v / Δ t (avg vel, acc)
v = λ f
PHY 7.1.2 and 9.2.4
E = hf (f = 1/T)
Ek = 1/2 mv2
PHY 5.3-4
Ep = mgh (kin, pot E)

We Suggest (can Save Time during Exam)

Translational motion
PHY 1.6 and 2.5
x = xo + vo t + 1/2at2    |    (Vf)2 = (Vo)2 + 2ax Vf = Vo + at
Uniform circular motion
PHY 3.3
Fc = mac = mv2 /r ac= v2 /r
Work, Power
PHY 5.1 and 5.7
W = F d cosθ P = ΔW/Δt
Spring Force, Work
PHY 7.2.1
F = -kx W = kx2 /2
Refraction
PHY 7.2.1
(sin θ1 )/(sin θ2 ) = v1 /v2 = n2 /n1 = λ12 n = c/v
Pressure
PHY 6.1.2
Δ Ρ = ρgΔh  
Atomic Physics
PHY 12.4
If the number of half-lifes n are known we can calculate the percentage of a pure radioactive sample left after undergoing decay since the fraction remaining = (1/2)n

Occasionally Helpful for Theoretical Questions

Frictional force
PHY 3.2
fmax = μN μk < μs always
Momentum, Impulse
PHY 4.3
I = F Δt = ΔM  
Electric Force
PHY 9.1.2
F = qE  
Optics
PHY 11.5
1/ i + 1/ o = 1/ f = 2/r = Power  
Specific Gravity
PHY 6.1.1
SG = ρ substance / ρ water ρ = 1 g/cm3 = 103 kg/m3 (H2O)
Note: Specific gravity (SG) is equivalent to the fraction of the height of a buoyant object below the surface of the fluid.

Don't Memorise, Know How to Use...

Fluids in Motion
PHY 5.3-4
Bernouilli's Equation

Ρ + ρgh + 1/2 ρv2 = constant

Solids, Temp Δ
PHY 5.3-4
Linear Expansion L = Lo (1 + αΔ T )
  Area Expansion
PHY 6.3
A = Ao(1 + γΔ T )
β = 3 α
PHY 6.3
Volume Expansion

V = Vo(1 + βΔ T )

Doppler Effect: when d is decreasing use + vo and - vs
PHY 8.5.1
fo = fs (V ± vo )/( V ± vs )  
d = the distance between the plates
PHY 10.4
V = Ed for a parallel plate capacitor  
RH rule
PHY 9.2.3
Laplace's Law dF = dq v(B sin α) = I dl(B sin α)
W = 1/2 CV2
PHY 10.4
Work in Electricity Potential Energy ( PE ) = W = 1/2 QV
ΔG° = -RTln Keq
CHM 9.10
Gibbs Free Energy ΔG = ΔH - TΔS
Continuity (fluids)
PHY 6.1.3
A v = const. ρAv = const.
Sound
PHY8.3.1 -4
dB = 10 log 10 (I/I0 ) beats = Δ f
Thermodynamics
PHY 8.7
Q = mc Δ T  
Root Mean Sq
PHY 10.5
Irms = Imax / √2  
Energy (conservation)
PHY 12.3
E = mc2  

The Basics

GAMSAT Basics
sin θ = opp/hyp cos θ = adj/hyp tan θ =opp/adj
θ = sin-1 x arcsec θ = sec-1θ r2 = x2 + y2

Please note: ACER announced in 2011 that calculators will no longer be permitted for GAMSAT Section 3. Our updated list of GAMSAT Physics Topics can be found towards the bottom of this page.

Some Units to Memorise

GAMSAT Physics Topics

The following GAMSAT Physics Topic list or syllabus is not meant to be exhaustive nor definitive. It is a guideline for topics that we cover for the GAMSAT preparation course during our live classes and in the videos that we have online or as DVDs.

TOPICS: The Atom, Nuclear Reactions, Radioactive Decay and Half-Life, Electricity vs. Gravity, Electric Circuits, Kirchhoff's Laws, Characteristics of Waves, Diffraction, Optics, Sound, Doppler Effect, Electromagnetism, Electromagnetic Spectrum, Reflection, Refraction, Thin Lens, Snell's Law, The Critical Angle, Force and Motion, Weight and Units, Friction, Applying Newton's Laws, Trigonometry, Projectile Motion, Work, Circular Motion, Work-Energy Theorem, Energy and Entropy, Momentum, Law of Torques, Fluids, Fluids in Motion, Archimedes' Principle

Related Helpful Links



Gold Standard GAMSAT Textbook

Gold Standard GAMSAT Preparation: Home Study Package

Copyright 2018. All Rights Reserved. Reproduction without permission is illegal. This document has an addendum with diagrams and additional equations/formulas/lists. The Only Prep You Need and RuveneCo are registered trademarks of RuveneCo Inc. The authors make no warranties expressed or implied regarding the use of these teaching materials, equations, lists or formulas which should be seen as a supplement to The Gold Standard Complete Package: the Platinum Program. Keywords: GAMSAT Physics, Formulas, Section III Equations and Summaries/Summary; Learn more here: GAMSAT.

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