# Another spring problem

In the diagram, there is a rigid link AB of length $$50\text{ cm}$$. It is attached to a frictionless bearing at point A. It can rotate about the bearing in the plane of the picture. The bearing is mounted on a rigid surface. A spring of spring constant $$k = 200 \text{ Nt / M}$$ is attached to link AB at a point $$25\text{ cm}$$ from bearing A. The spring is perpendicular to link AB, and its other end is anchored to a rigid surface. What is the effective spring constant at point B? (In $$\text{Nt/M}$$)?

×