1.Zokwanira pazitsulo zomatira.Zodziwikiratu mosayang'aniridwa.
2. Kutumiza zinthuzo mokhazikika, mwamphamvu komanso molingana mwa kugwedezeka ndi kuzungulira.Palibe alamu (ngati mukufuna).
3. Matalikidwe chosinthika kulamulira otaya.
4.Electromagnet mtundu kuphatikiza makina kugwedera kukankhira, kapangidwe kosavuta, yosavuta komanso yosavuta kukhazikitsa ndi kukonza.
5.Simple structureeasy kukhazikitsa ndi kukonza,otsika mtengo kukonza, moyo wautali utumiki.