Q3: A- 67.5 km/h (a) A train, traveling at a constant speed of 90km/h, crosses over a road. If automobile A is traveling at 67.5km/h along the road, a. Determine the magnitude of the relative velocity of the train with respect to the automobile (in km/h). A. 33.8 В. 63.8 C. 38.8 D. 88.8

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A: For solution refer below images.

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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.