« previous next »

Author Question: An ice skater has a moment of inertia of 5.0 kgm2 when her arms are outstretched. At this time she ... (Read 104 times)

Hungry!

  • Hero Member
  • *****
  • Posts: 1,071
on: Jul 29, 2018
An ice skater has a moment of inertia of 5.0 kgm2 when her arms are outstretched. At this time she is spinning at 3.0 revolutions per second (rps).
 
  If she pulls in her arms and decreases her moment of inertia to 2.0 kgm2, how fast will she be spinning?
  A)
 
  2.0 rps
 
  B)
 
  3.3 rps
 
  C)
 
  7.5 rps
 
  D)
 
  8.4 rps
 
  E)
 
  10 rps

Question 2

State Einstein's principle of equivalence.
 
  What will be an ideal response?


kardosa007

  • Sr. Member
  • ****
  • Posts: 300
Reply #1 on: Jul 29, 2018
Answer to Question 1

C

Answer to Question 2

There is no experiment observers can perform to distinguish if an acceleration arises because of a gravitational force or because their reference frame is accelerated.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

Did you know?

According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

The training of an anesthesiologist typically requires four years of college, 4 years of medical school, 1 year of internship, and 3 years of residency.

Nerves can transmit many signals at the same time Nerves can transmit many signals at the same time
Variety in Spiral Arms Variety in Spiral Arms
When young infants hold objects for a long period of time they eventually become habituated to them. When young infants hold objects for a long period of time they eventually become habituated to them.
Aggregates are people who happen to be in the same place at the same time. Aggregates are people who happen to be in the same place at the same time.
The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p The age-adjusted rate of melanoma, a deadly form of skin cancer, from 1973 to 2000. Over that time p
A time map of the genes studied in the experiment A time map of the genes studied in the experiment
Video: Vasectomy

For a complete list of videos, visit our video library