SPM Physics loves precision. Many students write “Resistance is directly proportional to Temperature” — but that’s exam danger. Two quantities increasing together does not automatically mean directly proportional.
The comic teaches the Directly Proportional Test:
Are both physical quantities defined? ✔
Is the graph a straight line through the origin? ✔
Is there a physics law supporting it? ✔
Examples:
YES: Force ∝ Extension (Hooke’s Law), Current ∝ Voltage (Ohm’s Law), Weight ∝ Mass.
NO: Resistance vs Temperature, Depth vs Pressure, Frequency vs Wavelength (same wave speed).
The lesson is simple: don’t memorise shortcuts. Prove it with data, graphs, and laws. One careless “∝” symbol can cost marks. AHA! Moment: Physics teaches: “increasing together” ≠ “directly proportional.” Life teaches: evidence before words, proof before claims.
AHA! Two lines may rise. One law makes them proportional. Not by sight, but by INSIGHT!
#AHAPhysicsMoments #CikguLimCY #PhysicsInEverydayLife
#100DaysOfPhysics #SeeWithPhysicsEyes #PhysicsWithInsight
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