# Find a Fnety force

1. Apr 18, 2010

### nmegabyte

2. Apr 18, 2010

### PhanthomJay

If you have been drawing free body diagrams, you should note that the reading on the scale is the tension in the cord.

3. Apr 18, 2010

### nmegabyte

hmmm i am trying it should be equal to zero the other force so they cancel each other isnt right?

4. Apr 18, 2010

### PhanthomJay

In part a, the tension in the cord 'cancels out' the weight of the salami, and therfore, the salami doesn't move (F_net = 0 per Newton 1 for bodies at rest). But that does not imply the spring scale reads 0 for that case, does it? Is the scale reading in part c different from the scale reading in part b? Why or why not?

5. Apr 18, 2010

### nmegabyte

its is the same but i guess they cancel each other cuz of the same force is this correct?

6. Apr 18, 2010

### PhanthomJay

The tension on each side of the spring scale is the same. But what does the spring scale read in part c?

7. Apr 18, 2010

### nmegabyte

142.1

8. Apr 18, 2010

### PhanthomJay

Yes. In Newtons.

9. Apr 18, 2010