Misalai 2 na tambayoyin daidaiton jiki masu tsauri
1. F1 = 10 N, F2 = 15 N da F4 = 10 N, yana aiki akan toshe ABCD kamar yadda aka nuna a cikin hoton. Tsawon toshe ABCD mita 20 ne. A ƙayyade F3 don haka toshen yana cikin daidaiton da ba ya canzawa. Yi watsi da nauyin toshen.
Tattaunawa:
2. An sanya akwatunan A (10 kg) da B (20 kg) a kan allon katako. Tsawon allon = mita 10. Idan akwatin B an sanya shi mita 2 daga allon, a wane nisa daga allon ya kamata a sanya akwatin A don kada allon ya juya? (g = 10 m/s 2 )
Tattaunawa:
Mataki na 1: zana zane na ƙarfin da ke aiki akan abin
Mataki na 2: magance matsalar
Duba zane a sama. Ƙarfin da ke aiki a kan allon sune nauyin akwatin B (w B ), nauyin akwatin A (w A ), nauyin allon (w allon) da ƙarfin al'ada (N). Matsayin juyawa shine axis na juyawa. Nauyin allon (w allon) da ƙarfin al'ada (N) sun yi daidai da fulcrum/axis na juyawa don haka hannun ƙarfin ya zama sifili. allon w da N ba a haɗa su cikin lissafin ba.
Juyin juyi na 1 = juyin juyi da ƙarfin nauyi na akwatin B (juyin juyi mai kyau) ke samarwa
Juyin juyi na 2 = juyin juyi da nauyin akwatin A (juyin juyi na korau) ya samar
Allon yana cikin daidaiton da ba ya canzawa idan jimlar karfin juyi = 0.
Domin allon ya kasance mai daidaito, dole ne a sanya abu A a nisan mita 4 daga wurin tallafi.
