That would give you the energy contained in the block (which you can only get at if you find it's antimatter equivelent), not how much energy is required to move it at 1000mph
You would also have to take into account things like air resistance.
The equation for power is P=Wd / t (where P is power, Wd is work done, and t is time).
So say if you wanted to move that block for 2000 seconds, you would have to calculate Wd, which uses the equation Wd=F x d (where F is force, and d is distance).
So now we could say the distance is 1000000000000m, but we need to find out the force, which uses the equation F= M x a (where M is mass, and a is acceleration).
So we take the mass as 200Kg, but we need the acceleration of the object, but the thing is that the mass won't be accelerating, it will be at a constant speed (1000mph), which means that a = 0.
This is where my GCSE/first couple of months of AS physics fail, as you need air resistance in there, because otherwise the object would just keep on going faster and faster. But we don't take into account air resistance in those equations
Plus you need to give it a constant supply of power to make it move at 1000mph, which when you throw it it won't have.
But thats only for linear motion, if it's hurling like throwing a ball to someone, then you have to take gravity into account as well...Otherwise if it's along the ground then it's friction....
All in all we need someone with degree level physics in here