A column is installed on two bearings and carries a pulley weighing 550 in the vertical direction in the middle of us in the figure. The pulley is connected to the shaft by means of a cog, and the pulley moves the transmission belt in the horizontal direction, the total tension in it is (3500), so if the received power is (15KW) at the speed (150rpm), find the diameter of the shaft required by imposing the permissible shear stress of 140MPa, and in tensile or bending it is equal to 220MPa

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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.