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Mr$.$ Belmir pulls a different box at constant speed across a different floor while applying an unknown force. $m_k$ is $0\mathrm{.}15$ and kinetic friction is $60$ N $.$

What is the weight of the box?

$-400N$

$-60N$

$-34\mathrm{.}5N$

$-434\mathrm{.}5N$