Kwa-fiziki, i-force kukutyhalwa okanye ukutsalwa okutshintsha okanye okudla ngokutshintsha into ebi imile okanye inqumamile okanye ihamba ngendlela enye efanayo okanye akukutshintsha kwendlela ebekuhamnjwa ngayo okanye indlela emile ngayo loo nto ithile. Amandla enza okokuba izinto zihambe ngesantya esiphezulu, abe ke ngoko ongeza kuxinzelelo, tshintsha umkhondo wendlela ehamba ngayo. hange direction, okanye kuctshintshe indlela emile ngayo loo nto. Amandla alinganiselwa ngee- Newtons. (N).