9. A member ABCD is subjected to point loads P1, P2, P3 and P4 as shown below. Calculate the force P, necessary for equilibrium, if P, is 45 kN, P, is 450 kN and P, is 130kN. Determine the total elongation of the member, assuming the modulus of elasticity to be 2.1 x 105 N/mm2 625 mm 1250 mm - 120 cm 60 cm -- 90 cm

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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.