Source: https://s46ccdb5d42a466f5.jimcontent.com/download/version/1482921953/module/5854117913/name/Devoir%20de%20Synth%C3%A8se%20N%C2%B01%20-%20Physique%20-%207%C3%A8me%20%282016-2017%29%20Mr%20Gala%C3%AF%20Abdelhamid.pdf