A 56-Kg Mass Is Held 5 Cm Above the End of of a Vertically

Multiple Choice

A 5.6-kg mass is held 5 cm above the end of a vertically oriented linear spring ( $k = 1200$ N/m) . The mass is released; it falls, compressing the spring. The spring then expands and does work on the mass. The velocity of the mass as it leaves the spring (in the upward direction) is

A) 1 m/s.
B) 3 m/s.
C) 4 m/s.
D) 2 m/s.