A Wind Farm Generator Uses a Two-Bladed Propeller Mounted on a Pylon

question 149

Multiple Choice

A wind farm generator uses a two-bladed propeller mounted on a pylon at a height of 20 m, as shown in the figure. The width of the pylon is very narrow, and the length of each propeller blade
Is 12 m. A tip of the propeller breaks off just when the propeller is vertical. The fragment flies off
Horizontally, falls, and strikes the ground at point P with negligible air resistance. Just before the
Fragment broke off, the propeller was turning uniformly, taking 1.2 s for each rotation. How far is
Point P from the base of the pylon?

• A) 130 m
• B) 120 m
• C) 160 m
• D) 140 m
• E) 150 m

---

Definitions:

Average Variable

Pertains to the expenses that change in proportion to the activity of a business, averaged per unit of production or operation.

Average Total Cost

The average cost per unit of output, calculated by dividing the total production cost by the number of units produced.

Producing Purses

The process of manufacturing handbags, which involves design, selection of materials, and assembly.

Average Fixed Cost

The aggregate fixed production costs per unit of output, calculated by dividing these costs by the total quantity of products made.