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

Calculating Work Done

  • Thread starter joe465
  • Start date
  • #1
94
0

Homework Statement



Calculate the work done on the crate during the journey

Homework Equations



WD=F*S

The Attempt at a Solution



I know its simple but im just double checking more than anything, the force pulling the crate is 482.96N and the distance is 20M.

Now i would presume 482.96*20= 9659.2J

My book however says that the force is the force we are opposing against so what force would this be?

Thanks, Joe
 

Answers and Replies

  • #2
Doc Al
Mentor
44,941
1,202
Can you please post the full problem exactly as given.
 
  • #3
94
0
The first of these concerns the transport of crates
across the floor of a factory. This is accomplished by using a drag line connected
to an electric motor. Crates are hooked on to the line and dragged from one
location within the factory to another across a series of rollers.

the original problem was at :https://www.physicsforums.com/showthread.php?t=521477
On there also has an image of what i mean since it wont let me upload it twice.

I have currently calculated:

horrizontal component acting on the crate
the acceleration experienced by the crate
the speed of the crate at the end of a 20m journey
the kinetic energy of the crate at the end of the journey
the duration of the journey

It now wants the Work done on the crate during the journey

If thats any better, Cheers
 
  • #4
Doc Al
Mentor
44,941
1,202
It now wants the Work done on the crate during the journey
You've calculated it correctly.
 
  • #5
94
0
Thankyou very much for your time and help
 

Related Threads on Calculating Work Done

  • Last Post
Replies
3
Views
927
  • Last Post
Replies
6
Views
843
  • Last Post
Replies
17
Views
2K
  • Last Post
Replies
2
Views
5K
  • Last Post
Replies
11
Views
7K
  • Last Post
Replies
1
Views
426
  • Last Post
Replies
2
Views
4K
  • Last Post
Replies
4
Views
3K
  • Last Post
2
Replies
25
Views
697
Replies
2
Views
7K
Top