Example 1
Doing 3,000 J of work in 10 s corresponds to 300 W.
Mendeleev
Physics tools
All toolsElements
EnglishEN⌄
Languages
EnglishENFrançaisFRDeutschDEEspañolESItalianoITPortuguêsPTNederlandsNLPolskiPLSvenskaSVČeštinaCSDanskDANorskNOSuomiFITürkçeTRРусскийRUУкраїнськаUK中文ZH日本語JAБългарскиBGCatalàCAΕλληνικάELEestiETHrvatskiHRMagyarHULëtzebuergeschLBLietuviųLTLatviešuLVRomânăROSlovenčinaSKSlovenščinaSLСрпскиSR한국어KOTiếng ViệtVIBahasa IndonesiaIDBahasa MelayuMSالعربيةARहिन्दीHIไทยTHעבריתHEÍslenskaIS
Physics tools › Mechanical power
Mendeleev · Physics
Mechanical power
Power measures how quickly energy is transferred or work is done. Two machines can perform the same work but have different powers if one finishes sooner.
Formula usedP = W / Δt
Calculate
Mechanical power
What do the symbols mean?
Ppower
Wwork
Δtelapsed time
Two worked examples
Example 2
A machine transferring 2.4 MJ in 20 min has an average power of 2.0 kW.
Good to knowPower is conventionally written P and measured in watts.