v = (7130009.81 / sin(245))^0.5
v = (6994530 / 1)^0.5
v = 2644.72 ms^-1
So we need to launch at 2,645 metres per second (9,522 kph, 5,917 mph). To get the energy, we use the kinetic energy equation:
e = 0.5 m v^2
e = 0.584328002644.72^2
e = 29,491,794,808,885.76 joules
e = 29.5 terajoules
For comparison, the nuclear bomb dropped on Hiroshima exploded with about 60 terajoules of energy. So once you account for air resistance you're probably looking at a nuke of energy.