A uniform rod BC of mass 10 kg is connected to a collar A by a 350-mm cord AB. Neglecting the mass of the collar and cord, determine (a) the smallest constant acceleration a for which the cord and the rod will lie in a straight line, (b) the corresponding tension in the cord. Hint: The smallest constant acceleration is attained when point C of the rod is about to leave the floor. ад 350 mm 650 mm с A B 450 mm

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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.