« 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 62 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?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

For pediatric patients, intravenous fluids are the most commonly cited products involved in medication errors that are reported to the USP.

Did you know?

According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

Did you know?

Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

Single-dose drug administration: pharmacokinetic values for this drug are as follows: onset of actio Single-dose drug administration: pharmacokinetic values for this drug are as follows: onset of actio
A new drug development time line with the four phases of drug approval. A new drug development time line with the four phases of drug approval.
Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body
Disitive Time For Potatoes Disitive Time For Potatoes
A(n) _____ is a spur-of-the-moment question. Fill in the blank(s) with correct word A(n) _____ is a spur-of-the-moment question. Fill in the blank(s) with correct word
Physics: Power, Energy and Time Physics: Power, Energy and Time
Video: ribosome

For a complete list of videos, visit our video library