Mass of block(m)=0.290 kg
Spring Constant k = 4.65×10³ N/m
Initial elongation =0.0500 m=5 cm
Thus Initial Potential Energy stored =Final Potential Energy stored in Block
Pi = kx² / 2
Pi = (4.65×10³) (25×10−⁴) / 2
Pi = 5.81 J
Pf = m g h
Pf = (0.290) (9.81) (h)
Pi = Pf
5.81 = 0.29×9.81×h
h = 2.04 m