Laws of Motion 5 Question 4
4. Two particles of mass each are tied at the ends of a light string of length . The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance from the centre (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force . As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes , is
(2007, 3M) (a) Obtain the relation between
(b) It is desired to measure
(a)
(b)
(c)
(d)
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Answer:
Correct Answer: 4. (a)
Solution:
- As, from
(Free Body Diagram),
So,
Acceleration of particle