A force F of magnitude 80 N is exerted on the automobile parking-brake leVer al lie an equivalent force-couple system at the pivot point O. F 20° 15°

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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.