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 78 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?

Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Rotating around any node leaves a phylogeny unchanged Rotating around any node leaves a phylogeny unchanged
This wheel presentation is helpful for the detection of potential amphipathic helices This wheel presentation is helpful for the detection of potential amphipathic helices
Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic Atherosclerosis. (a) A sectioned coronary artery that exhibits an accumulation of fatty plaque, whic
Wheel of Nursing Wheel of Nursing
Thangka depicting Bhavacakra (Wheel of Life), Bhutan. Thangka depicting Bhavacakra (Wheel of Life), Bhutan.
A turbine wheel is turned by the expanding exhaust gases. A turbine wheel is turned by the expanding exhaust gases.
Video: The pH scale - Strong acids and Weak acids

For a complete list of videos, visit our video library