The elevator E shown in the figure moves upward according to the velocity profile that is presented. The elevator accelerates and decelerates at a constant rate of 0.12 m/s2 and the maximum speed it can reach is 0.8 m/s. E C W M VE (m/s) VE max t₁ t₂ tr t(s) Knowing that the elevator travels a height of 15 m to go from the first floor to the fifth floor of a building, determine the total time it takes the elevator to travel all five floors.

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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.