The car passes over the top of a vertical curve at A with a speed of 60kph and then passes through the bottom of a dip at B. The radii of curvature of the road at A and B are both 100m. Find the speed of the car at B if the normal force between the road and the tires at B is twice that at A. The mass center of

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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.