The frame shown is fitted with three 28 cm diameter frictionless pulleys. A force of F' = 640 N is applied to the rope at an angle 0 = 44°. Member ABCD is attached to the wall by a fixed support at A. Find the forces indicated below. a •E d F BY NC SA 2013 Michael Swanbom

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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.