So, V 2 square plus 2 u 2 into V A, which you can write as 2 V 2 1 plus V A by 2 or u 2 into 1 plus V A, V 2 into 1 plus 2 V A; it is wrong. So, it will become V 2 into V 2 plus 2 V A. So, now, these two will be equal, is not it? Work done by the thrust and the kinetic energy change, rate of change of kinetic energy, they are same; they represent power.