GAMSAT Physics Equation List (formulas) and practice problems in dimensional analysis
Momentum, Impulse PHY 4.3 |
M = mv | |
Energy (conservation) PHY 5.5 |
E_{T} = E_{k} + E_{p} | |
Work, Power PHY 5.7 |
P = ΔW/Δt | |
Current PHY 10.1 |
I = Q/t | |
Resistors (series, par.) PHY 10.2 |
R_{eq} = R_{1} + R_{2} . . . | 1/ R_{eq} = 1/ R_{1} +1/ R_{2} . . . |
Capacitors (series, par.) PHY 10.4 |
1/ C_{eq} = 1/ C_{1} +1/ C_{2} . . . | C_{eq} = C_{1} + C_{2} . . . |
Kirchoff's Laws PHY 10.3.1 |
Σi = 0 at a junction | ΣΔV = 0 in a loop |
Torque forces PHY 4.1 |
L_{1} = F_{1}× r_{1} (CCW + ve) | L_{2} = F_{2} × r_{2} (CW -ve) |
Torque force at EQ PHY 4.1 |
ΣF_{x} = 0 and ΣF_{y} = 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 | F_{b}= Vρg = mg |
Optics PHY 11.3 |
M = magnification = - i/o |
F = K_{G} ( m_{1} m_{2} / r^{2} ) PHY 2.4 and 9.1.2 |
F = k ( q_{1} q_{2} / r^{2} ) | Intensity = power/area ∝ 1 / r^{2} PHY 8.3 |
V = IR PHY 10.1 and 10.5 |
P = IV | Paired Use |
v_{av} = Δ d / Δ t PHY. 1.4.1 |
a_{av} = Δ v / Δ t | (avg vel, acc) |
v = λ f PHY 7.1.2 and 9.2.4 |
E = hf | (f = 1/T) |
E_{k} = 1/2 mv^{2} PHY 5.3-4 |
E_{p} = mgh | (kin, pot E) |
Translational motion PHY 1.6 and 2.5 |
x = x_{o} + v_{o} t + 1/2at^{2} | (V_{f})^{2} = (V_{o})^{2} + 2ax | V_{f} = V_{o} + at |
Uniform circular motion PHY 3.3 |
F_{c} = ma_{c} = mv^{2} /r | a_{c}= v^{2} /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 = kx^{2} /2 |
Refraction PHY 7.2.1 |
(sin θ_{1} )/(sin θ_{2} ) = v_{1} /v_{2} = n_{2} /n_{1} = λ_{1} /λ_{2} | 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} |
Frictional force PHY 3.2 |
f_{max} = 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/cm^{3} = 10^{3} kg/m^{3} (H_{2}O) |
Note: Specific gravity (SG) is equivalent to the fraction of the height of a buoyant object below the surface of the fluid. |
Fluids in Motion PHY 5.3-4 |
Bernouilli's Equation | Ρ + ρgh + 1/2 ρv^{2} = constant |
Solids, Temp Δ PHY 5.3-4 |
Linear Expansion | L = L_{o} (1 + αΔ T ) |
Area Expansion PHY 6.3 |
A = A_{o}(1 + γΔ T ) | |
β = 3 α PHY 6.3 |
Volume Expansion | V = V_{o}(1 + βΔ T ) |
Doppler Effect: when d is decreasing use + v_{o} and - v_{s} PHY 8.5.1 |
f_{o} = f_{s} (V ± v_{o} )/( V ± v_{s} ) | |
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 CV^{2} PHY 10.4 |
Work in Electricity | Potential Energy ( PE ) = W = 1/2 QV |
ΔG° = -RTln K_{eq} 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/I_{0} ) | beats = Δ f |
Thermodynamics PHY 8.7 |
Q = mc Δ T | |
Root Mean Sq PHY 10.5 |
I_{rms} = I_{max} / √2 | |
Energy (conservation) PHY 12.3 |
E = mc^{2} |
sin θ = opp/hyp | cos θ = adj/hyp | tan θ =opp/adj |
θ = sin^{-1} x | arcsec θ = sec^{-1}θ | r^{2} = x^{2} + y^{2} |
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.
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
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