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A wooden box is sitting on a table. The normal force on the box from the table is 75 N. A second identical box is placed on top of the first box. The normal forces on the first box by the table will ______?

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A wooden box is sitting on a table. The normal force on the box from the table is 75 N. A second identical box is placed on top of the first box. The normal forces on the first box by the table will ______? Answer: Increase to 150 N

The normal force on the first box will increase to 150 N because the table must now support the combined weight of both identical boxes. When the second box is added, the total downward force (weight) becomes 75 N + 75 N = 150 N, and the normal force from the table must equal this new total weight to keep the system in equilibrium.

Question context

This question is part of ⚙️ Mechanical Eng within the broader 🛠️ Engineering Essentials subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.