Physics question
 

Working on some physics homework and i have had a brain fart and im stuck, would appreciate some help. Here is the problem

A small fly of mass 0.24 http://session.masteringphysics.com/...=%7B%5Crm+g%7D is caught in a spider's web. The web vibrates predominately with a frequency of 5.0 http://session.masteringphysics.com/...%7B%5Crm+Hz%7D. What is the value of the effective spring stiffness constant http://session.masteringphysics.com/render?tex=k for the web?


so i use the formula

T=2pi*sqrt(m/k)

We dont have T but we have hz so if we take the recipocal we get T which is .2s. Gotta make sure i convert grams to kg since my answer is in n/m

.2=2pi*sqrt(.00024kg/k)

To get rid of the square root i square everything in the equation right?

so thats

.04=4*pi^2*(.00024/k)


then what? (assuming i was on the right track

divide both sides by 2pi first, then square

k is around .25

Susie is correct as long as the math was all done properly.

The misses just confirmed it. (Shes working on a PhD in physics... I just play instruments.)

great, dividing by 2pi first did the trick. Thanks all[thumbup]

Was .25 close? Don't have a real calculator (and **** the windows calculator), so I did it in my head.

yeah i think it was like .2638 or somethin like that.

Thanks again[thumbup]