A vertical spring is fixed to one of its end and a massless plank pland fitted to other end, A block is released from a height (h) as shown, spring is in relaxed position then choose the correct statement.
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All the surfaces are frictionless and system is released from test when ideal spring of stiffness k is in its relaxed state. Choose the correct statement.

All the surfaces are frictionless and system is released from test when ideal spring of stiffness k is in its relaxed state. Choose the correct statement.

A spring with one end attached to a mass and the other to a rigid support is stretched and released.

A spring with one end attached to a mass and the other to a right support is stretched and released

A spring with one end attached to a mass and the other to a rigid suppord is stretched and released.

A spring with one end attached to a mass and the other to a right support is stretched and released

A bead of mass m can slide without friction on a fixed circular horizontal ring of radius 3R having a centre at the point C. The bead is attached to one of the ends of spring of spring constant k. Natural length of spring is R and the other end of the spring is R and the other end of the spring is fixed at point O as shown in the figure. If the bead is released from position A, then the kinetic energy of the bead when it reaches point B is

A bead of mass m can slide without friction on a fixed circular horizontal ring of radius 3R having a centre at the point C. The bead is attached to one of the ends of spring of spring constant k. Natural length of spring is R and the other end of the spring is R and the other end of the spring is fixed at point O as shown in the figure. If the bead is released from position A, then the kinetic energy of the bead when it reaches point B is