« 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 71 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?

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

Did you know?

Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Before a vaccine is licensed in the USA, the Food and Drug Administration (FDA) reviews it for safety and effectiveness. The CDC then reviews all studies again, as well as the American Academy of Pediatrics and the American Academy of Family Physicians. Every lot of vaccine is tested before administration to the public, and the FDA regularly inspects vaccine manufacturers' facilities.

Did you know?

To combat osteoporosis, changes in lifestyle and diet are recommended. At-risk patients should include 1,200 to 1,500 mg of calcium daily either via dietary means or with supplements.

Compression Occurs in vertebrae subjected to extreme stresses, as when one falls and lands on his or Compression Occurs in vertebrae subjected to extreme stresses, as when one falls and lands on his or
Work and Gender: Women at Work in India Work and Gender: Women at Work in India
Work and Gender: Women at Work in India Work and Gender: Women at Work in India
Alzheimer’s medications work by intensifying the effect of acetylcholine at the receptor. Alzheimer’s medications work by intensifying the effect of acetylcholine at the receptor.
Slap the foot bottom with the back of the hand. Rapid, light slaps create a stimulating sensation. Slap the foot bottom with the back of the hand. Rapid, light slaps create a stimulating sensation.
A Painter At Work A Painter At Work
Video: Male Reproductive System - The gonadotropin releasing hormone

For a complete list of videos, visit our video library