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Question

From a fixed support, two small identical spheres are suspended by means of strings of length 1m each. They are pulled aside as shown and then released. B is the mean position. Then the two spheres collide.
572099_02e497423d2845028d3f7b1b672fcbe5.png
  1. At B after 0.25 second
  2. At B after 0.5 second
  3. On the right side of B after some time
  4. On the right side of B when the strings are inclined at 15o with B

A
At B after 0.25 second
B
On the right side of B after some time
C
On the right side of B when the strings are inclined at 15o with B
D
At B after 0.5 second
Solution
Verified by Toppr

Regardless of what their amplitudes are they would take same time to reach B i.e quarter of time period (imagine if each of them are released from the fixed support, Point B is located at one quarter of the total circle).
Length of string, l=1 m
Time period, T=2πlg=2 s

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