• Support PF! Buy your school textbooks, materials and every day products Here!

Help with the work done problem!

  • #1
Hi,

Some confusion with the attached problem. Some of us say that the work done on the load is W(x+y) while some others are saying that the WD on the load is just Wy since the motor moves the distance x and that work is done by the motor.

Could we have some clarifications?

Din
 

Attachments

Answers and Replies

  • #2
berkeman
Mentor
57,470
7,490
Hi,

Some confusion with the attached problem. Some of us say that the work done on the load is W(x+y) while some others are saying that the WD on the load is just Wy since the motor moves the distance x and that work is done by the motor.

Could we have some clarifications?

Din
Welcome to the PF.

What are your arguments in favor of each choice?
 
  • #3
Option (A): One of us argues, since that is the distance the object moves, the WD should be that distance.

Option (B): The WD here is to bring the load up by a dist of y and multiplied by the force acting on it, which is the weight.

Force x Dist moved in the direction of the force

Option (D) : Since the object moves a horizontal distance of x followed by the vertical distance y, thus it W(x+y).
 
  • #4
SammyS
Staff Emeritus
Science Advisor
Homework Helper
Gold Member
11,315
1,005
What's the definition of work?

Do the relative directions of displacement and force matter?
 

Related Threads on Help with the work done problem!

Replies
7
Views
3K
  • Last Post
Replies
6
Views
3K
Replies
8
Views
5K
Replies
1
Views
746
  • Last Post
Replies
17
Views
2K
  • Last Post
Replies
2
Views
965
Replies
1
Views
1K
  • Last Post
Replies
2
Views
4K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
4
Views
399
Top