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

Total work done on a screw.

  • Thread starter smhippe
  • Start date
19
0
1. Homework Statement
It takes 20 turns to drive a screw completely into a block of wood. Because the
friction force between the wood and the screw is proportional to the contact area between
the wood and the screw, the torque required for turning the screw increases linearly with
the depth that the screw has penetrated into the wood. If the maximum torque is 12 N m
when the screw is completely in the wood, what is the total work (in Joules) required to
drive in the screw?


3. The Attempt at a Solution
So I tried to do an integral by finding out how much the torque changed per rotation. Then using that as the equation and the total distance turned to be plugged in.
[tex]\int.6x[/tex] from 0 to 7200. I got a very large number and I don't think I did it right....
 

Want to reply to this thread?

"Total work done on a screw." You must log in or register to reply here.

Related Threads for: Total work done on a screw.

  • Posted
Replies
2
Views
2K
  • Posted
Replies
5
Views
2K
  • Posted
Replies
7
Views
2K
  • Posted
Replies
4
Views
5K
Replies
7
Views
6K
  • Posted
Replies
2
Views
2K
Replies
4
Views
6K
  • Posted
Replies
1
Views
6K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving
Top