A pendulum consists of a bob of mass m=0.1 ~kg and a massless inextensible string of length L=1.0 ~m . It is suspended from a fixed point at height H=0.9 ~m above a frictionless horizontal floor. Initially, the bob of the pendulum is lying on the floor at rest vertically below the point of suspension. A horizontal impulse P=0.2 ~kg - m / s is imparted to the bob at some instant. After the bob slides for some distance