GAMSAT Physics Equation Lists (Formulas and Topics)

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

• 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

## 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 ) 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 = λ1 /λ2 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

 sin θ = opp/hyp cos θ = adj/hyp tan θ =opp/adj θ = sin-1 x arcsec θ = sec-1θ r2 = x2 + y2
• Angle θ may be given in radians (R) where 1 revolution = 2πR = 360°
• Estimate square root 3 as 1.7 and root 2 as 1.4 (N.B. calculators are no longer permitted so these details may save you time in GAMSAT Physics or GAMSAT Chemistry).
• Cross-sectional area of a tube = area of a circle = πr2 where π can be estimated as 3.14 and r is the radius of the circle; circumference = 2πr.

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

• Both work and energy are measured in joules where 1 joule (J) = 1 N × 1 m . {Imperial units: the foot-pound , CGS units: the dyne-centimeter or erg }
• The SI unit for power is the watt (W) which equals one joule per second (J/s) = volts × amperes .
• Current is measured in amperes = coulombs/sec. The units of resistance are ohms, symbolized by Ω (omega), where 1 ohm = 1 volt/ampere.
• The SI unit for pressure is the pascal (1 Pa = 1 N/m2 ). Other units are: 1.00 atm = 1.01 × 105 Pa = 1.01 bar = 760 mmHg = 760 torr.

## 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

## Gold Standard's GAMSAT Guide

To help you prepare for the exam, Gold Standard GAMSAT has assembled comprehensive information on GAMSAT scores, topics covered, preparation advice, free GAMSAT sample questions and other study resources.

• What is the GAMSAT? - GAMSAT-prep.com's detailed guide about the GAMSAT
• GAMSAT Scores - A complete resource that explains how the GAMSAT is scored and other questions relating to GAMSAT scoring
• Free GAMSAT Resources - A comprehensive guide on preparing for each section of the GAMSAT with links to relevant study resources
• Australian Medical Schools Admission Requirements - A comprehensive list of GAMSAT scores and GPA scores for graduate entry medicine (GEM) programmes in Australia and Australasia
• Free GAMSAT Study Schedule - Even if you don't own any of the Gold Standard GAMSAT materials, this study schedule remains helpful as it details the subjects covered for review and practice on a daily basis.
• GAMSAT Study Tips on Efficient Note-taking - One of our popular resources! Read tips on how to consolidate your review by creating brief notes a.k.a. Gold Notes that will be vital in your daily review in the lead up to the real exam.
• Free Monthly GAMSAT Webinars - Take advantage of our free monthly online seminars (webinars) using a problem-based learning approach on the different topics in the GAMSAT and get a chance to win a GAMSAT giveaway.
• Non-science Background GAMSAT Preparation - Dr Ferdinand (author of The Gold Standard GAMSAT books) outlines the 70/30 formula to get a high score. Also includes a link to advice on related topics.

### Free GAMSAT practice:

• Free GAMSAT Practice Test - This abbreviated, timed practice test includes all three sections with instant scaled scores and helpful worked solutions.
• GAMSAT Practice Question of the Day - Develop your GAMSAT reasoning skills with daily practice, one subject at a time
• GAMSAT Physics Sample Questions - 15 free GAMSAT Physics sample questions with answers and worked solutions to hone your basic problem-solving skills and understanding of Section 3 material

Copyright 2020. 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.