Trying to find how much work is done by friction

  • Thread starter fvjjk
  • Start date
  • #1
1
0

Homework Statement


A man drags a table 4.05 m across the floor, exerting a constant force of 51.0 N, directed 25.0° above the horizontal.

How much work is done by friction? Assume the table's velocity is constant.


Homework Equations


work= umgxsin[tex]\vartheta[/tex]
f=uF

The Attempt at a Solution


I dont understand how I am supposed to find the coefficient of friction without knowing what the mass is.
 

Answers and Replies

  • #2
Lok
555
23
E=F*x
Energy=Force*distance

The Force and distance need to be parallel and that is where the 25'deg angle comes into play.

No need for mass, as people are fat enough.

Have fun!!!
 

Related Threads on Trying to find how much work is done by friction

Replies
5
Views
1K
Replies
7
Views
8K
Replies
4
Views
10K
Replies
6
Views
5K
  • Last Post
Replies
1
Views
4K
  • Last Post
Replies
4
Views
7K
  • Last Post
Replies
1
Views
4K
Replies
11
Views
1K
  • Last Post
Replies
7
Views
2K
  • Last Post
Replies
6
Views
3K
Top