« previous next »

Author Question: How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant ... (Read 70 times)

Yolanda

  • Hero Member
  • *****
  • Posts: 757
on: Jul 28, 2018
How much work is done by a person lifting a 2.0-kg object from the bottom of a well at a constant speed of 2.0 m/s for 5.0 s?
 a. 0.22 kJ
  b. 0.20 kJ
  c. 0.24 kJ
  d. 0.27 kJ
  e. 0.31 kJ

Question 2

A 2.0-kg projectile moves from its initial position to a point that is displaced 20 m horizontally and 15 m above its initial position. How much work is done by the gravitational force on the projectile?
 a. +0.29 kJ
  b. -0.29 kJ
  c. +30 J
  d. -30 J
  e. -50 J


stano32

  • Sr. Member
  • ****
  • Posts: 339
Reply #1 on: Jul 28, 2018
Answer to Question 1

B

Answer to Question 2

B


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.

Did you know?

Approximately one in four people diagnosed with diabetes will develop foot problems. Of these, about one-third will require lower extremity amputation.

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?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

In 1864, the first barbiturate (barbituric acid) was synthesized.

Bayliss and Starling discovered the mechanism by which the small intestine and pancreas work togethe Bayliss and Starling discovered the mechanism by which the small intestine and pancreas work togethe
Visual Object Agnosia Without Prosopagnosia Visual Object Agnosia Without Prosopagnosia
Shortly after his death, George Washington had already become myth—part Moses, part angel—in this wo Shortly after his death, George Washington had already become myth—part Moses, part angel—in this wo
Compression ratio is the ratio of the total cylinder volume (when the piston is at the bottom of ... Compression ratio is the ratio of the total cylinder volume (when the piston is at the bottom of ...
Work of Running Water Work of Running Water
Chemistry work Chemistry work
Video: Muscular Dystrophy

For a complete list of videos, visit our video library