Basic Topics in JEE Physics Cheat Sheet

Key Definitions

• Kinematics: Study of motion without considering forces.

• Dynamics: Study of forces and their impact on motion.

• Work: Transfer of energy when a force is applied over a distance.

• Energy: Capacity to do work.

• Power: Rate of doing work.

Important Concepts

Mechanics

• Newton's Laws of Motion:

• 1st Law: An object remains at rest or in uniform motion unless acted upon.

• 2nd Law: F = ma (Force equals mass times acceleration) ✅

• 3rd Law: For every action, there is an equal and opposite reaction.

Waves

• Wave Properties: Wavelength, frequency, amplitude.

• Sound Waves: Longitudinal waves that require a medium.

Thermodynamics

• Laws of Thermodynamics:

• 1st Law: Energy cannot be created or destroyed (Conservation of Energy) ✅

• 2nd Law: Entropy of an isolated system always increases.

Key Formulas

• Kinematic Equations:

• v = u + at ✅

• s = ut + 0.5at^2 ✅

• v^2 = u^2 + 2as ✅

• Work-Energy Theorem: W = ΔKE = KE_final - KE_initial ✅

• Power: P = W/t ✅

Common Mistakes to Avoid

Common Mistake: Confusing scalar (magnitude only) with vector (magnitude + direction) quantities.

Memory Tricks

Tip: "Kinematic Equations" — SUVAT:

• S = Displacement

• U = Initial Velocity

• V = Final Velocity

• A = Acceleration

• T = Time

Key Diagrams

       |\
       | \
       |  \  (Force Diagram)
       |   \
       |____\

  Wave Diagram
  Amplitude
    |
    |       .       .
    |      / \     / \
    |_____/___\___/___\____
          Wavelength