PROBLEM 11.141 240 km/h A Racecar A is traveling on a straight portion of the track while racecar B is traveling on a circular portion of the track. At the instant shown, the speed of A is increasing at the rate of 10 m/s, and the speed of B is decreasing at the rate of 6 m/s. For the position shown, determine (a) the velocity of B relative to A, (b) the acceleration of B relative to A. 50 300 m 200 km/h

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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.