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

Author Question: An electrical motor spins at a constant 2857.0 rev/min. If the armature radius is 2.685 cm, what is ... (Read 158 times)

mpobi80

  • Hero Member
  • *****
  • Posts: 519
on: Jul 29, 2018
An electrical motor spins at a constant 2857.0 rev/min. If the armature radius is 2.685 cm, what is the acceleration of the outer edge of the armature?
 
  A) 2403 m/s2
  B) 844.4 m/s2
  C) 241,100 m/s2
  D) 84.40 m/s2

Question 2

An ice skater doing a spin pulls in her arms, decreasing her moment of inertia by a factor of two. How does her angular speed changes?
 
  A) It is reduced by a factor of two.
  B) It is reduced by a factor of four.
  C) It increases by a factor of two.
  D) It increases by a factor of four.
  E) It doesn't change.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Cnarkel

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 29, 2018
Answer to Question 1

A

Answer to Question 2

C


mpobi80

  • Member
  • Posts: 519
Reply 2 on: Jul 29, 2018
Excellent

bitingbit

  • Member
  • Posts: 323
Reply 3 on: Yesterday
Gracias!

« previous next »
 

Did you know?

About 100 new prescription or over-the-counter drugs come into the U.S. market every year.

Did you know?

Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

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?

Vaccines prevent between 2.5 and 4 million deaths every year.

Relationship between fruit radius and beak length in populations of native and introduced species of Relationship between fruit radius and beak length in populations of native and introduced species of
Primary Motor Cortex and Seizures Primary Motor Cortex and Seizures
The Body as Mapped on the Motor Cortex and Somatosensory Cortex The Body as Mapped on the Motor Cortex and Somatosensory Cortex
Most stepper motors use four wires, which are pulsed by the computer to rotate the armature in ... Most stepper motors use four wires, which are pulsed by the computer to rotate the armature in ...
Withr this assumption, the maximum radius of M+ is Withr this assumption, the maximum radius of M+ is
Motor and Sensory Cortex Motor and Sensory Cortex
Video: Types of synapses - electrical & chemical

For a complete list of videos, visit our video library