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

Author Question: An object of mass 20 kg is raised vertically through a distance of 8.0 m above ground level. Using g ... (Read 123 times)

londonang

  • Hero Member
  • *****
  • Posts: 540
on: Jul 29, 2018
An object of mass 20 kg is raised vertically through a distance of 8.0 m above ground level. Using g = 10 m/s2 what is the potential energy of this object at this position?
 
  A) 1.6 J
  B) 16 J
  C) 160 J
  D) 1600 J
  E) 16000 J

Question 2

A 50.0-N box is sliding on a rough horizontal floor, and the only horizontal force acting on it is friction. You observe that at one instant the box is sliding to the right at 1.75 m/s and that it stops in 2.25 s with uniform acceleration.
 
  What magnitude force does friction exert on this box? A) 3.97 N
  B) 8.93 N
  C) 38.9 N
  D) 50.0 N
  E) 490 N


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

frankwu0507

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 29, 2018
Answer to Question 1

D

Answer to Question 2

A


londonang

  • Member
  • Posts: 540
Reply 2 on: Jul 29, 2018
Thanks for the timely response, appreciate it

jomama

  • Member
  • Posts: 346
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

Did you know?

It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

A herd of barren-ground caribou at the Thelon River. This subspecies is a long-distance migrant A herd of barren-ground caribou at the Thelon River. This subspecies is a long-distance migrant
(Left panel) The transition level (TL) for moving out of the parental home for 240 young men and ... (Left panel) The transition level (TL) for moving out of the parental home for 240 young men and ...
Phrases that Decrease Customer Service Level Phrases that Decrease Customer Service Level
Air-Mass Thunderstorms Air-Mass Thunderstorms
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
The tertiary level of protein structure for the respiratory pigment myoglobin The tertiary level of protein structure for the respiratory pigment myoglobin
Video: Stimulus (introduction)

For a complete list of videos, visit our video library