Rufangu (Acceleration)- iri izwi rinoreva kuchinja kweSpidhi paumwe hwechiyero chenguva. Rufangu rune chiyero (m/s2). Rufangu runowanikwa nekugova spidhi pane nguva. Tsazaniso inoti Rufangu = (kuchinja kwemuchacha/nguva), (m/s2). Barotse vanoti -fwankula (to run at full speed) vachireva kumhanya bara rakasimba.