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Iam having trouble with this question:

A block B of mass 5 kg is fastened to one end of each of two springs. The other ends of the springs are attached to fixed points A and C, 4 metres apart on a smooth horizontal surface, as shown in the diagram <the link contains the file>.

http://s3.yousendit.com/d.aspx?id=2ZAI1AKPYV05L1MUR0PJY6RRMP

Spring AB has natural length 2 metres and modulus of elasticity 30 N, while BC has natural length 1 metre and modulus 40 N (you may assume that the springs meet at the centre of B).

(i)Find the length of AB when B is in its natural equilibrium position.

now if extension = length of the spring - natural length

Iam i required to find out the length of the spring?

If i am then using hooke's law T=kx, 5g=30x/2 i get x= 3.26 as the extension.

I would appreciate some help

thanks in advance

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# Homework Help: Elastic Spring

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