sbse sasta internet kis desh me h? general knowledge. #shorts

A string is wrapped several time on a cylinder of mass M and radius R , the cylinder is pivoted about its axis of symmetery . A block mass of m tied to the string rests on support so that the string is black. The block is lifted upto a height h and the support is removed. (shown in figure) When the string experience a jerk, a large impulsive force is generated for a short duration, so that contribution of weight mg can be neglected suring this duration. then what will be speed of blocks m , just after string has becomes taut