question_answer

A system consists of two identical cubes, each of mass 3 kg, linked together by a compressed weightless spring of force constant 1000 N/m. The cubes are also connected by a thread which is burnt at a certain moment. At what minimum value of initial compression \[{{x}_{0}}\](in cm) of the spring will the lower cube bounce up after the thread is burnt through?

Answer:

9.00