Applied Mechanics and Graphic Statics
The centre of gravity of a homogeneous body is the point at which the whole

All listed here
Volume of the body is assumed to be concentrated
Weight of the body is assumed to be concentrated
Area of the surface of the body is assumed to be concentrated

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Applied Mechanics and Graphic Statics
When a body of mass M1 is hanging freely and another of mass M2 lying on a smooth inclined plane(α) are connected by a light index tensile string passing over a smooth pulley, the acceleration of the body of mass M1, will be given by

g(M2 + M1 sin α)/(M1 + M2­) m/sec²
g(M2 × M1 sin α)/(M2 - M1­) m/sec²
g(M1 - M2 sin α)/(M1 + M2­) m/sec²
g(M1 + M2 sin α)/(M1 + M2­) m/sec

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