Two particle of mass m each are tied at the ends of a light string of...

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Two particle of mass m each are tied at the ends of a light string of length 2a. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance 'a' from the center P (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force F. As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes 2x is (A) (C) F a 2m a. FX 2m a (B) (D) F X 2m a- F a-x -X 2m X 2 m a F P a m Two particle of mass m each are tied at the ends of a light string of length 2a. The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance 'a' from the center P (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force F. As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes 2x is (A) (C) F a 2m a. FX 2m a (B) (D) F X 2m a- F a-x -X 2m X 2 m a F P a m

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