Dynamics - Using the coefficient of friction

  • Thread starter K.QMUL
  • Start date
  • #1
54
0

Homework Statement



You are to lower a safe of mass 260kg at constant speed downs skids 20.0m long, from a truck 2.0m high.
a) If the coefficient of friction between the safe and the skids is 0.25, do you need to pull the safe down or hold it back?

b)How great a force parallel to the skids is needed?

Homework Equations



F=μN

The Attempt at a Solution



Please see image
 

Attachments

  • 20131013_193328.jpg
    20131013_193328.jpg
    30.7 KB · Views: 474

Answers and Replies

  • #2
arildno
Science Advisor
Homework Helper
Gold Member
Dearly Missed
10,025
134
Looks correct.
 

Related Threads on Dynamics - Using the coefficient of friction

  • Last Post
Replies
5
Views
10K
Replies
5
Views
7K
Replies
2
Views
2K
  • Last Post
Replies
0
Views
3K
Replies
5
Views
3K
Replies
5
Views
2K
Replies
8
Views
3K
Replies
1
Views
3K
Replies
16
Views
1K
Top