5-ma’ruza. Mexanik energiyaning saqlanish qonuni

Blokgasarflanganish W = F d

The work done by gravity is the height of the cliff times the mass of the block times the acceleration of gravity.

Gravitatsiya qonuniga asoslanib bajarilgan ish qoyaning balandligi va toshning massasining kopaytmasiga teng.

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Umumiy hollarda, kuch moduli va yo‘nalishi bo‘yicha o‘zgarib turishi mumkin.

O‘zgaruvchan kuch bajargan ishni aniqlash uchun, bosib o‘tilgan yo‘lni shunday kichik bo‘lakchalarga bo‘lamizki, ularning har birini to‘g‘ri chiziqdan iborat va ulardagi ta’sir kuchni o‘zgarmas, deb hisoblaymiz (3-rasm). U holda elementar ish