NEED HELP ASAP A dart of 0.2-kg mass is loaded 0.05m into a vertically coiled spring (as shown on the right) and then is released. The spring has a stiffness constant k = 800 N/m and negligible mass.
Initial energy stored in spring = J

Final gravitational potential energy of dartwhen spring is relaxed (with the dart still in contact with the spring) = J

Final kinetic energy of dart(at the moment it leaves the spring) = J

Final speed of dart(at the moment it leaves the spring) = m/s

Maximum height of the dart(include the 0.05 meters of the initial spring compression) = m