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

Author Question: At what rate is the gravitational force on a 2.0-kg projectile doing work at an instant when the ... (Read 52 times)

cmoore54

  • Hero Member
  • *****
  • Posts: 568
on: Jul 28, 2018
At what rate is the gravitational force on a 2.0-kg projectile doing work at an instant when the velocity of the projectile is 4.0 m/s directed 30 above the horizontal?
 a. +39 W
  b. -78 W
  c. -39 W
  d. +78 W
  e. +25 W

Question 2

A 6.0-kg block slides along a horizontal surface. If k = 0.20 for the block and surface, at what rate is the friction force changing the mechanical energy of the block at an instant when its speed is 4.0 m/s?
 a. -59 W
  b. -47 W
  c. -71 W
  d. -82 W
  e. +71 W


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dyrone

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 28, 2018
Answer to Question 1

C

Answer to Question 2

B


cmoore54

  • Hero Member
  • *****
  • Posts: 568
Reply #2 on: Jul 28, 2018
TY


dyrone

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jul 28, 2018
You're welcome


« previous next »
 

Did you know?

There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

Did you know?

When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Did you know?

HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

Did you know?

Many supplement containers do not even contain what their labels say. There are many documented reports of products containing much less, or more, that what is listed on their labels. They may also contain undisclosed prescription drugs and even contaminants.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Fluidization - Reaction Rate Chart Fluidization - Reaction Rate Chart
Where do Psychological Practitioners Work? Where do Psychological Practitioners Work?
For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ... For each function f(x) = 6x^2 - 4, estimate the instantaneous rate of change for the given ...
Arguments take place when partners are home from work Arguments take place when partners are home from work
finding the resultant force finding the resultant force
Question about Resultant of gravitational force? Question about Resultant of gravitational force?
Video: Spinal Cord Injury Animation

For a complete list of videos, visit our video library