what is "power" for a Concorde?
When it is standing at the start of the runway, with all four engines at full dry thrust, you have about 120 000 lbf thrust, but the power is... zero, because that force isn't moving.
absolutely true.
If you push against a wall you do no work on the wall as it does not move, but your muscles are still expending the same engergy - you get tired, muscles heat up, heart works harder to pump against contracted muscles etc.. basically effort wasted.
Concorde with its brakes on and engines running at full tilt at the end of the runway does not gain kinetic energy so it takes no energy from the engines -
but the engines still do substantial work if not the same, after all its burning the same amount of fuel, but it all goes into moving fast air as jet blast (jet-wash) noise, heat etc.