PRUJINANING BIKRLIGINI ANIQLASH (2-laboratoriya ishi) Ishning maqsadi: O`quv dinamometri prujinasining bikrligini aniqlash. Kerakli asbob va materiallar: panjali shtativ, spiralsimon prujina, yuklar to`plami, millimetrli qog`oz tasma yoki millimetr bo`limli chizg`ich. Ishni bajarish tartibi: 1. Dinamometrni 56-rasmda ko`rsatilgandek qilib mahkamlang. 2. Dinamometr shkalasiga millimtrli qog`oz yopishtiring yoki xuddi o`shanday millimetr bo`limli chizg`ich mahkamlang. 3. Yuk osmasdan oldin dinamometr strelkasining boshlang`ich vaziyatini belgilang. 4. Dinamometr prujinasiga m massali yuk iling va uning ta'sirida prujinaning Δl uzayishini o`lchang. 56-rasm. 5. Prujinaning 2m, 3m va 4m yuklar ta'siridagi uzayishlarini toping. 6. O`lchashlar natijalari bo`yicha prujinaning bikrligini formula bo`yicha hisoblang. Bu yerda k -prujina bikrligi (N/m), m -yuk massasi (kg), g-erkin tushish tezlanishi , l -prujinaning cho'zilishi (m). 7. Topilgan qiymatlari bo`yicha prujina bikrligining o'rtacha arifmetik qiymatini toping.