AP EAMCET Engineering 2018 Apr 23 Shift 1 Paper

As shown in the figure, two particles, each of mass 'in' tied at the ends of a light string of length 2a are kept on a fiictionless horizontal surface. When the mid point (P) of the string is pulled vertically upwards with a small but constant force F. the particles move towards each other on the surface. Magnitude of acceleration of each particle, when the separation between them becomes 2x is