- #1

- 848

- 102

## Homework Statement

## Homework Equations

## The Attempt at a Solution

Length of the unstretched springs is L .Suppose block is pushed towards C by a small distance x . This causes a change in length of springs B and C . Their new length is L+∆L .Consider spring B. If the new length makes a small angle θ with the vertical .

I need to find relation between ∆L and x .

Applying cosine rule ,

x

^{2}= (L+∆L)

^{2}+ L

^{2}-2L(L+∆L)cosθ

For small angles , cosθ≈1.

Using this I get ∆L = x .

This is not correct . What is the mistake ?