« previous next »

Author Question: Two balls, A and B, of mass m and 2m respectively, are carried to height h at constant velocity, but ... (Read 54 times)

big1devin

  • Hero Member
  • *****
  • Posts: 583
on: Jul 28, 2018
Two balls, A and B, of mass m and 2m respectively, are carried to height h at constant velocity, but B rises twice as fast as A. The work the gravitational force does on B is
 a. one quarter the work done on A.
  b. one half the work done on A.
  c. the same as the work done on A.
  d. twice the work done on A.
  e. four times the work done on A.

Question 2

When a ball rises vertically to a height h and returns to its original point of projection, the work done by the gravitational force is
 a. 0.
  b. -mgh.
  c. +mgh.
  d. -2mgh.
  e. +2mgh.


shaikhs

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.

Did you know?

The Centers for Disease Control and Prevention has released reports detailing the deaths of infants (younger than 1 year of age) who died after being given cold and cough medications. This underscores the importance of educating parents that children younger than 2 years of age should never be given over-the-counter cold and cough medications without consulting their physicians.

Did you know?

Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

Electrospray mass spectrometry of a protein Electrospray mass spectrometry of a protein
Air Mass Thunderstorms Air Mass Thunderstorms
Positive velocity graph Positive velocity graph
How to find the average atomic mass of an element How to find the average atomic mass of an element
Mass Wasting Forms Mass Wasting Forms
For toluene (shown below), you would expect to see which m/z fragment in the mass spectrum? For toluene (shown below), you would expect to see which m/z fragment in the mass spectrum?
Video: Origin of organelles Animation

For a complete list of videos, visit our video library