what is center of gravity?
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The centre of gravity (COG) of the human body is a hypothetical point around which the force of gravity appears to act. It is point at which the combined mass of the body appears to be concentrated. Because it is a hypothetical point, the COG need not lie within the physical bounds of an object or person....
Short circuit occurs when resistance of that device i.e. internal resistance and resistance that we apply to the circuit i.e. external resistance cannot resist it since R=0. At the time of short circuit, large amounts of current flow means current increases and large amounts of energy is delivered through the circuit.
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Centre of Gravity
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Introduction
Centre of Gravity
The centre of gravity (COG) of the human body is a hypothetical point around which the force of gravity appears to act. It is point at which the combined mass of the body appears to be concentrated[1]. Because it is a hypothetical point, the COG need not lie within the physical bounds of an object or person. One subjective way (there are objective measures) to approximate the COG of an object is to visualise it balancing on one finger.