Muchidzidzo Fundoyetsimba, simba (Energy) zvinoreva kupimwa kwehuwandu hwebasa rinotarisirwa kuitwa nemutandira (zvakarongeka) (system). Kune marudzi esimba akawanda ose anopimwa nechiyero chinonzi Joule - kunova kuyerwa kwesimba rinenge rashanda kana Fosi ye 1 newton yafamba nhambwe ye 1m ichisunda chinhu. Tsanangudzo yokuti chinonzi gumbapamwe chii iri kutevera mberi.

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