A test car starts from rest on a horizontal circular track of 60-m radius and increases its speed at a uniform rate to reach 100 km/h in 16 seconds. Determine the magnitude a of the total acceleration of the car 9 seconds after the start. 60 m

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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.