QI/ VO A loaded railroad car is rolling at a constant velocity when it couples with a spring and dashpot bumper system. After the coupling, the motion of the car is defined by the relation x= 60e are expressed in mm and seconds, respectively. Determine the position, the velocity and the k 4.8t sin16t where x and t acceleration of the railroad car when (a)t = 0, (b) t = 0.3 s.

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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.