Two highways intersect as shown in the figure. At the instant shown, a police car P is distance dP = 840 m from the intersection and moving at speed vP = 84 km/h. Motorist M is distance dM = 450 m from the intersection and moving at speed vM = 45 km/h. What are the (a) x-component and (b) y-component of the velocity of the

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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.