Q5: The initially stationary 12-kg block is subjected to the time-varying force whose magnitude P is shown in the plot. The 30° angle remains constant. Determine the block speed at (a) t = 1 s and (b) t = 4 s . | Ans.: (a) v1 = 0 (b) v4 = 2.69 m/s right ] %3D 100 12 kg 30° (H = 0.50 Me =0.40 %3D %3D 1, S P,N 5

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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.