2. A point particle of mass m moves in a plane under the influence of a force F, F(r)=-kr-1 where k and 8 are positive constants. The force is directed towards the origin. Assuming the potential energy to be zero at the origin and choosing appropriate generalised coordinates, write down the Lagrangian and identify the cyclie coordinate. Is the angular monentum

2. A point particle of mass m moves in a plane under the influence of a force F, F(r)=-kr-1 where k and 8 are positive constants. The force is directed towards the origin. Assuming the potential energy to be zero at the origin and choosing appropriate generalised coordinates, write down the Lagrangian and identify the cyclie coordinate. Is the angular monentum