Two blocks of masses `m` and `2m` rest on a frictionless horizontal surface. They are connected by an ideal spring of relaxed length `l` and stiffness constant `k`. By means of a massless thread connecting the blocks the spring is held compressed to a length `l//2`. the whole system is moving with speed `v` in a direction perpendicular to the length of the spring. the thread is then burnt. Answer the following questions in terms of `l,km,v`
Before burning, the rato of kinetic energy to potential energy is:
A. `(12mv^(2))/(kl^(2))`
B. `(mv^(2))/(12kl^(2))`
C. `(12kl^(2))/(mv^(2))`
D. `(kl^(2))/(12mv^(2))`