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

Author Question: A 50. cm diameter wheel is rotating initially at 2.0 revolutions per second. It slows down uniformly ... (Read 24 times)

cdr_15

  • Hero Member
  • *****
  • Posts: 546
on: Jul 27, 2018
A 50. cm diameter wheel is rotating initially at 2.0 revolutions per second. It slows down uniformly and comes to rest in 15 seconds.
 
  (a) What was its angular acceleration?
  (b) Through how many revolutions did it turn in those 15 s?

Question 2

The near point of a farsighted person is 100 cm. She places reading glasses close to her eye, and with them she can comfortably read a newspaper at a distance of 25 cm. What lens power is required?
 
  A) +2.5 D
  B) +3.0 D
  C) -2.0 D
  D) +3.2 D
  E) -2.5 D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Fayaz00962

  • Sr. Member
  • ****
  • Posts: 330
Reply #1 on: Jul 27, 2018
Answer to Question 1

(a) -0.13 rev/s2 = -0.84 rad/s2
(b) 15. rev

Answer to Question 2

B


cdr_15

  • Hero Member
  • *****
  • Posts: 546
Reply #2 on: Jul 27, 2018
Thank you!


Fayaz00962

  • Sr. Member
  • ****
  • Posts: 330
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Did you know?

In 2010, opiate painkllers, such as morphine, OxyContin®, and Vicodin®, were tied to almost 60% of drug overdose deaths.

Did you know?

Hip fractures are the most serious consequences of osteoporosis. The incidence of hip fractures increases with each decade among patients in their 60s to patients in their 90s for both women and men of all populations. Men and women older than 80 years of age show the highest incidence of hip fractures.

Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.

Rotating phylogenetic trees Rotating phylogenetic trees
The cranium of a young infant changes dramatically in shape with age. Initially the child has severa The cranium of a young infant changes dramatically in shape with age. Initially the child has severa
The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha The recent mass upheavals in Tunisia, Egypt, Libya, Yemen, and Syria gave political scientists a cha
Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ... Light in air is initially traveling parallel to the face AC of an equilateral triangular prism, ...
In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter. ... In another solar system, a planet has an airless moon Zygo that is 4.0 × 105 m in diameter. ...
A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ... A wheel of diameter 0.70 m rolls on the floor without slipping. A point at the top of the wheel ...
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library