Work-Energy Theorem
Total work done by all forces (conservative, non-conservative, external) on a particle equals the change in its kinetic energy.
Grade 11th · Physics · Work, Energy and Power
Work-Energy Theorem, Power & Elastic Collisions
Master Work-Energy Theorem, Power & Elastic Collisions for Grade 11th Physics. Includes verified formulas, core concepts, step-by-step checklists, and interactive solver tools.
Science StreamIntermediate Level
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Essential Formulas & Mathematical Definitions
Wnet = ΔKE = ½mv² - ½mu²
Uspring = ½ k x²
P = F · v
1D Elastic: v1 = [(m1-m2)u1 + 2m2 u2] / (m1+m2)
Elastic vs Inelastic Collisions
Elastic collisions conserve both linear momentum and kinetic energy (e = 1). Inelastic collisions lose kinetic energy to deformation and heat (e < 1).
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Exam Day Revision & Problem Solving Checklist
- ✓Conservative forces have zero work along any closed loop
- ✓Potential energy is defined only for conservative forces (F = -dU/dx)
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High-Yield Exam Strategy & Scoring Tips
Step-by-Step Mark Allocation
Always state the governing principle or formula first, write given values with standard SI units, substitute clearly, and highlight the final numerical answer with units in a box for full step marking.
Common Calculation Traps
Watch for unit prefixes (cm to m, minutes to seconds, g to kg, degrees to radians). In coordinate and ray optics problems, double-check Cartesian sign conventions before computing.
Recommended Practice & Calculation Tools
Test your understanding and perform instant calculations with these free online utilities.
Scientific Physics Motion & Electricity Calculator
Solve core physics formulas for Grade 10th, 11th, and 12th: motion kinematics, force, Ohm's law, and wave physics.
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Units, Dimensions & Error Propagation
Master Units, Dimensions & Error Propagation for Grade 11th Physics. Includes verified formulas, core concepts, step-by-step checklists, and interactive solver tools.
Units and MeasurementsUnits, Dimensions & Error Propagation: Core Theory, Derivations & Solved Proofs
In-depth theoretical breakdown, mathematical derivations, foundational axioms, and step-by-step proofs. covering Units, Dimensions & Error Propagation for Class 11th Physics.
Units and MeasurementsUnits, Dimensions & Error Propagation: Formula Cheat Sheet & Solved Numericals
Complete formula reference, variable dimensions, numerical step-by-step problem-solving templates, and sample calculations. covering Units, Dimensions & Error Propagation for Class 11th Physics.
Units and MeasurementsUnits, Dimensions & Error Propagation: Exam Revision Checklist & High-Yield PYQs
Board exam previous year questions, high-frequency question patterns, common calculation traps, and rapid revision notes. covering Units, Dimensions & Error Propagation for Class 11th Physics.
Frequently Asked Exam Questions & Concept Clarifications
What is coefficient of restitution (e)?
Ratio of relative velocity of separation to relative velocity of approach: e = (v2 - v1) / (u1 - u2).