If I have a designed gear box that needs a motor to run , and according to my calculations the input power for the gear box must be 10 Kw at 10 r.p.s must I chose a motor with the same input specifications ? when I buy a motorwith certain specifications like : 10 kw 3000 R.P.M , does these specifications change when the motor has a certain load ?? and is it right to say that when a motor run at no-load it runs freely at its specifications rates and when we put a load on the motor the specifications decreases example , we have a motor that run at 10 kw and 1000 r.p.m at no load , when we attach it to a complex gear box would the motor deliver a power that is less than 10 kw and it will rotate the input shaft of the gear box at less than 1000 r.p.m? or the motor must run at the same specifactions at no load ?