IGCSE›Edexcel IGCSE Physics›Mind mapsWork, Power & Energy ResourcesEdexcel IGCSE Physics: Mind mapStudy pack PDFAlso for this subtopic:Revision notesFlashcardsSubtopic testCover factsWork doneEnergy transferred when a force moves an objectW=F×dW = F \times dW=F×dDistance is in the direction of the forceWork done = energy transferredGPE and KEGPE = energy due to heightGPE=mgh\text{GPE} = mghGPE=mghKE = energy due to motionKE=12mv2\text{KE} = \frac{1}{2}mv^2KE=21mv2ConservationFree fall: loss in GPE = gain in KELifting: work done raises GPE by same amountReal life: some energy goes to thermal storesWork & Powerand energy resourcesW=FdW=FdW=FdJWPowerRate of energy transfer or doing workP=WtP = \frac{W}{t}P=tWHigher power = energy transferred faster1200 J in 4 s → 300 WEnergy resourcesWind, water, geothermal turn turbinesSolar cells convert radiation directly to electricityFossil fuels and nuclear heat water to steamRenewables never run out but can be unreliableNon-renewables reliable but pollution or wasteExam tipsGPE to KE exact only if no air resistanceCompare resources: reliability, cost, pollution, scaleGive advantages and disadvantages, not just one