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The object has weight - that is, gravity is pulling it down.

However, the table is in the way, and it gets "squashed" by the object's weight, so it exerts a "normal reaction force" upwards on the object.

The downward weight and upward reaction force cancel out, so the book stays still on the table.

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13y ago
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6mo ago

An object on a table does not crash to the ground because it experiences a normal force from the table equal in magnitude and opposite in direction to the force of gravity pulling it downward. This normal force provides the necessary support to keep the object in equilibrium on the table.

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Q: Why does an object on a table not crash to the ground?
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