Work, Energy and Power

IIT-JEE · Class 11 · Physics

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What’s covered

  • topics
    • Work Done by a Force
      • definition and scalar product formulation
    • Nature of Work
      • positive work
      • negative work
      • zero work
      • frame-dependence of work
    • Work by Variable Force
      • graphical interpretation as area under the F-x curve
    • Work by Specific Forces
      • work done by gravity
      • work by an interacting pair of forces
      • work by static friction
      • work by kinetic friction
      • work by spring force
      • work by a pseudo (inertial) force
    • Kinetic Energy
      • definition and formula
    • Work–Energy Theorem
      • statement
      • derivation and applications
    • Conservative vs Non-Conservative Forces
      • definitions and identification
    • Potential Energy
      • gravitational PE
      • elastic PE stored in a spring
      • change in PE
      • three-dimensional formula for PE
      • potential energy curve
      • energy diagram for a two-atom attractive system
      • nature of force and stability of equilibrium
    • Mechanical Energy
      • conservation of mechanical energy
    • Power
      • mechanical power
      • instantaneous vs average
    • Applications of Power
      • power of a water-drawing pump