A uniform beam of length 3 meters and mass 10 kilograms is balanced horizontally on a pivot point. A weight of 20 newtons is attached to one end of the beam. What is the torque exerted on the beam by the weight? (Assume the weight is attached at the very end of the beam and gravity acts vertically downward.)

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Center of Gravity of a system

The centre of gravity is a property that is based on the geometry of a rigid body or any particle. It is described as an equilibrium point or a hypothetical location where the total weight of the body is concentrated.