The displacement x of a particle by time is given by the expression  x = 4 cos (3.0πt + π) where x is in meters and t is in seconds. Determine the frequency and period of the motion

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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.