JEE Advanced 2019 Paper 2, Question 2
A block of mass 
is attached to a massless spring with spring-constant 
. This block is connected to two other blocks of masses 
and using two massless pulleys and strings. The accelerations of the blocks are 
and 
as shown in the figure. The system is released from rest with the spring in its unstretched state. The maximum extension of the spring is 
. Which of the following option(s) is/are correct?
[
is the acceleration due to gravity. Neglect friction]
- When spring achieves an extension of
for the first time, the speed of the