10 November
Free bilingual TNPSC Physics notes on Work, Energy and Power with Simple Machines — W = Fs cosθ, kinetic and potential energy, the work–energy theorem, conservation of energy, power, 1 hp = 746 W, 1 kWh = 3.6 × 10⁶ J, mechanical advantage, velocity ratio, efficiency, the three classes of levers, pulleys and the inclined plane. Includes 14 key points, detailed English and Tamil notes, 5 practice MCQs with answers, memory tricks and previous year questions for TNPSC Group 1, 2, 2A, 4 and VAO.