A Hurricane Strength Wind Is Blowing at a Speed of 100

question 21

Multiple Choice

A hurricane strength wind is blowing at a speed of 100 km/hr over a flat square roof of 10 m per side.Assuming the inside of the house to be at 1 atm pressure and the density of air is 1.3 kg/m³,calculate the lifting force on the roof.

• A)5.0 \(\times\) 10³ N
• B)3.8 \(\times\) 10⁴ N
• C)5.0 \(\times\) 10⁴ N
• D)1.0 \(\times\) 10⁵ N
• E)6.5 \(\times\) 10⁴ N

---

Definitions:

Diminishing Rate

A principle stating that if one factor of production is increased while others are held constant, the incremental gains in output will eventually decrease.

Long Run

Refers to a period in economics where all factors of production can be adjusted, and all costs are variable, allowing for complete industry adjustment.

Renovate

The process of restoring or improving a building, room, or structure to make it more attractive, functional, or to bring it up to current standards.

Marginal Product Curve

A graphical representation showing how the addition of a single unit of resource alters the total output of a good or service.