R12-8. Car B turns such that its speed is increased by (a)a = (0.5e') m/s, where t is in seconds. If the car starts from rest when 0 0°, determine the magnitudes of its velocity and acceleration when t= 2 s. Neglect the size of the car. 5 m Prob. R12-8

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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.