A light elastic string $$\(A B\)$$ has natural length $$\(11 a\)$$ and modulus of elasticity $$\(6 m g\)$$ A particle of mass $$\(4 m\)$$ is attached to the point $$\(C\)$$ on the string where $$\(A C=8 a\)$$ and a particle of mass $$\(2 m\)$$ is attached to the end $$\(B\)$$ The end $$\(A\)$$ of the string is attached to a fixed point and the string hangs vertically below $$\(A\)$$ with the particle of mass $$\(4 m\)$$ in equilibrium at the point $$\(P\)$$ and the particle of mass $$\(2 m\)$$ in equilibrium at the point $$\(Q\)$$, as shown in Figure 1. (a) Find the length $$\(A P\)$$ (3) (b) Find the length $$\(P Q\)$$ (3)

Answer:

Knowledge points:

Solution: