The weight is given by the equation $W=mg$, where $m$ is the mass and $g$ is the acceleration due to gravity. Here, the total mass $m$ is the sum of the man's mass and the chair's mass, which is $70.0 \, \mathrm{kg} + 5.0 \, \mathrm{kg} = 75.0 \, \mathrm{kg}$. The
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