This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A wind farm generator uses a two-bladed propeller (see figure) mounted on a pylon at a height of 20 ... (Read 131 times)

cabate

  • Hero Member
  • *****
  • Posts: 537
on: Jul 29, 2018
A wind farm generator uses a two-bladed propeller (see figure) mounted on a pylon at a height of 20 m.
 
  The length of each propeller blade is 12 m. A small piece from the tip of the propeller breaks off when the propeller is vertical. At that instant, the period of the motion of the propeller is 1.2 s. The fragment flies off horizontally, falls with negligible air resistance, and strikes the ground at P.
  (a) How far is point P from the base of the pylon?
  (b) At what angle with respect to the vertical is the fragment moving just as it strikes the ground at P?
 
  What will be an ideal response?

Question 2

A disk-shaped space station 175 m in diameter spins uniformly about an axis perpendicular to the plane of the disk through its center. How many rpm (rev/min) must this disk make so that the acceleration of all points on its rim is g/2?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

leahm14

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Answer to Question 1

Answer: (a) 160 m (b) 68

Answer to Question 2

Answer: 2.26 rev/min


cabate

  • Member
  • Posts: 537
Reply 2 on: Jul 29, 2018
:D TYSM

bbburns21

  • Member
  • Posts: 336
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Did you know?

For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

It is important to read food labels and choose foods with low cholesterol and saturated trans fat. You should limit saturated fat to no higher than 6% of daily calories.

In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi In this cartoon, Boss Tweed welcomes cholera—a skeletal figure of death carrying a handbag from “Asi
Paul Colin, Figure of a Woman. Paul Colin, Figure of a Woman.
A treated wool blanket is kept in an easy-toopen, wall-mounted holder and should be placed in a ... A treated wool blanket is kept in an easy-toopen, wall-mounted holder and should be placed in a ...
Mobilize knuckles with figure-8s. Turn the hand so palm faces the table. Grasp the proximal phalange ... Mobilize knuckles with figure-8s. Turn the hand so palm faces the table. Grasp the proximal phalange ...
The Geostrophic Wind The Geostrophic Wind
An example of continuous variation: biology students organized according to height. An example of continuous variation: biology students organized according to height.
Video: Import of Dietary Glucose from Intestines to Bloodstream

For a complete list of videos, visit our video library