Posted by **clueless** on Friday, May 22, 2009 at 12:13am.

The scale of a spring balance reading from 0 to 250N has a length of 10.0 cm. A fish hanging from the bottom of the spring oscillates vertically at a frequency of 2.85 Hz.

Ignoring the mass of the spring, what is the mass m of the fish?

(and why the heck do we have a fish on a spring?)

- physics -
**bobpursley**, Friday, May 22, 2009 at 9:16am
I am uncertain when is the length 10cm? When stretched with a 250N force?

if so, k=250/.1=2500N/m

If you are in a calculus based physics course, this is of some interest

http://www.kettering.edu/~drussell/Demos/SHO/mass.html

If you are in a plug and chug physics course, then

f=1/2PI *sqrt(k/m) and you solve for m.

- physics -
**annie**, Friday, May 22, 2009 at 3:02pm
thanks! i used the two equations for w0 and set them equal to each other and solved for m and it worked!

thanks!

## Answer this Question

## Related Questions

- physics - A vertical scale on a spring balance reads from 0 to 220N . The scale ...
- Physics - please help me.. - A 1.35 kg mass is suspended from a spring with a ...
- physics - A 0.67-kg metal sphere oscillates at the end of a vertical spring. As ...
- physics - A 0.67-kg metal sphere oscillates at the end of a vertical spring. As ...
- Physics - A 0.56-kg metal sphere oscillates at the end of a vertical spring. As ...
- PLEASE HELP!! PHYSICS - A 0.63-kg metal sphere oscillates at the end of a ...
- physics - A spring balance has a scale that reads from 0to50 kg.The length of ...
- Physics - A 4.8 kg container of water sits on a scale A. A cube of aluminum ...
- physics - A vertically hanging spring has a mass of 50 N hanging from it. Under ...
- Physics - VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/...