1. The problem statement, all variables and given/known data https://wug-s.physics.uiuc.edu/cgi/courses/shell/common/showme.pl?cc/DuPage/phys2111/fall/homework/Ch-08-GPE-ME/mass_vertical_spring/7.gif [Broken] A spring with spring constant k = 45 N/m and unstretched length of L0 is attached to the ceiling. A block of mass m = 1.5 kg is hung gently on the end of the spring. a) How far does the spring stretch? Answer = 0.327m Now the block is pulled down until the total amount the spring is stretched is twice the amount found in part (a). The block is then pushed upward with an initial speed vi = 2 m/s. b) What is the maximum speed of the block? <---this one Im not sure of. 2. Relevant equations 0.5*m*v^2 = Ke 0.5*k*x^2 = K(spring) U + K = Uo + Ko 3. The attempt at a solution 0.5*m*v(final)^2 = 0.5*m*v(initial)^2 + 0.5*k*x^2 for v I got 4.1 m/s. But the answer is incorrect. Any ideas where I went wrong?