The normal force is equal to the weight of the box, which is given by the formula: \( F_N = m \times g \), where \( m = 50 \, \text{kg} \) and \( g = 9.8 \, \text{m/s}^2 \).
\( F_N = 50 \, \text{kg} \times 9.8 \, \text{m/s}^2 = 490 \, \text{N} \)
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