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**Q:A rectangular plate of sides a and b is supended from a ceiling by two parallel strings of length L each(Fig). The Separation between the strings is d. The plate is displaced slightly in its plane keeping the strings tight. Show that it will execute SHM. Find the time period**

http://www.freeimagehosting.net/newuploads/z8fe5.jpg

Basic SHM equations:

1.F=-kx

2.T=(2*pi)/(omega)

**Let the plate be displaced a slightly for a displacement x and the angle of strings with vertical be theta.**

2Tsin(theta)=-ma

Using Approx.

sin(theta)=x/L

-2Tx/L=-ma

I dont know how to eliminate T from the equation. Plz help!

2Tsin(theta)=-ma

Using Approx.

sin(theta)=x/L

-2Tx/L=-ma

I dont know how to eliminate T from the equation. Plz help!

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