The 10-lb block has a speed of 4 ft/s when the force of F= (8t^2) lbf is applied. Determine the velocity of the block when t= 2 s. The coefficient of kinetic friction at the surface is uk = 0.2

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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.