400 N والی 0. = 79:2 F = 211-8 N: ۲۲ في الشکل ۲ـ ۲۶ اذا علمت آن 75 محصلة القوی الثلاث مساوية 45 ل لمصفر اوجد قيمة كل من القوتین P , F F = 250 N , P= 350 N ج : الشکل ۲ - ۲۹ ۳۷

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Conservation of Energy

In physics, the rule of the conservation of energy states that energy doesn’t disappear from the atmosphere; instead, it changes its form from one type to another. Energy is one of the most important physical quantities in nature, and it cannot be created or destroyed — only transformed.