At a given instant, the position of a plane at A and a train at B are measured relative to a radar antenna at O as shown in the Figure. Distances are OA = 3 km and OB = 2 km. Formulate a position vector, directed from AA to BB.

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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.