RECAP (Part–iv) : 15 Golden Rules to Handle Physics Problems (Exam-Oriented)

These 15 Golden Rules are distilled from IIT toppers’ strategies and examiner expectations. If students follow these rules consistently, accuracy and confidence increase automatically.

GOLDEN RULE–1 : Never Rush to a Formula

Physics is not formula memory; it is force-based reasoning.

Rule: Think → Decide method → Then write formula.

GOLDEN RULE–2 : Acceleration Is the King

Always ask:

Is acceleration zero?
Is acceleration constant?

Reason: Force depends on acceleration, not velocity.

GOLDEN RULE–3 : Draw FBD Without Exception

Free Body Diagram prevents 80% of mistakes.

Exam Truth: Even toppers draw FBD in MCQs (mentally or on rough sheet).

GOLDEN RULE–4 : Friction Opposes Tendency, Not Motion

Friction direction is decided by possible relative motion.

Trap: Assuming friction opposite to velocity blindly.

GOLDEN RULE–5 : Static Friction Is Self-Adjusting

Static friction value is not fixed.

Formula: f_s ≤ μ_sN

GOLDEN RULE–6 : Constant Velocity Means Zero Net Force

If both magnitude and direction of velocity are constant:

ΣF = 0

But: Constant speed alone does not guarantee zero force.

GOLDEN RULE–7 : Choose Axes Along Motion

Smart axis selection simplifies equations.

Example: Inclined plane → choose axis along the plane.

GOLDEN RULE–8 : Prefer System Approach When Possible

If internal forces cancel, treat bodies as one system.

Benefit: Fewer equations, less confusion.

GOLDEN RULE–9 : Short Time Force → Impulse

Force acting for very short time requires momentum approach.

Rule: Small time mentioned → avoid F = ma.

GOLDEN RULE–10 : Direction Matters More Than Magnitude

In many IIT problems, direction decides the answer.

Example: Force perpendicular to velocity → speed constant.

GOLDEN RULE–11 : Check Extreme & Limiting Cases

IIT loves boundary situations:

Just starts moving
Free fall
Steady motion

GOLDEN RULE–12 : Do Not Trust Numbers Blindly

After calculation, always check:

Units
Sign
Physical sense

GOLDEN RULE–13 : Velocity Zero ≠ Acceleration Zero

This single confusion costs many marks.

Classic example: Topmost point of vertical motion.

GOLDEN RULE–14 : Tricks Are for Speed, Not Thinking

Never use tricks without understanding.

Order: Concept → Method → Equation → Trick

GOLDEN RULE–15 : Confidence Comes From Process, Not Memory

Following a fixed process eliminates fear.

Topper Mindset: “I know how to approach this.”

FINAL 30-SECOND EXAM MANTRA

Read calmly
Visualize
Decide acceleration
Draw FBD
Select method
Solve cleanly
Check logic

RECAP (Part–iv) Completed.
These 15 Golden Rules convert knowledge into marks for Intermediate and IIT–JEE exams.

📚 Physics Thinking Library – How IIT Toppers Think

Welcome to the Physics Thinking Library by Mind Grow Magazine. This library is specially designed for IIT–JEE & Intermediate students to understand how toppers think, decide, and solve Physics problems.

🎯 What You Will Learn From This Library

How IIT toppers approach Physics questions
Decision-making during problem solving
Common traps & how to avoid them
Exam-hall mindset and logic flow
Step-by-step thinking framework

📘 Complete Series: How IIT Toppers Think (Part 1–25)

Click on any part below to start learning. It is recommended to read in order.

🧠 How to Use This Library Effectively

Read 1–2 parts daily
Apply thinking to real Physics problems
Revisit library before exams
Use as a mindset guide, not memorization

MIND GROW Magazine