A string with one end fixed on a rigid wall, passing over a fixed frictionless pulley at a distance of `2m` from the wall, has a point mass M of `2kg` attached to it at a distance of `1m` from the wall. A mass `m` of `0.5kg` is attached to the free end. The system is initially held at rest so that the stirng is horizontal between wall and pulley and vertical beyond the pulley as shown in figure.

What will be the speed with which point mass M will hit the wall when the system is released? `(g=10ms^-2)`

Answer

C