Which modulus is used to describe a force perpendicular to an object, such as wind blowing against a building

Bulk Modulus

Explanation:

Bulk stress occurs when an object is acted upon by forces on all sides. An example is when an object is submerged in water and it experiences pressure from the water acting upon it on all sides. This is similar to a situation where the wind blows against a building. It is a form of volume stress because the object experiences pressure from all sides.

When the object experiences this pressure from the force acting on it, there is usually a change in volume. The modulus for bulk stress is Bulk Modulus.

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explanation:

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