Answer:

40 watt

Explanation:

Power:  The word Power in Physics means rate of doing a work, i.e how much energy it consumes in the given time.

Now what is energy?

Energy in physics means capacity of doing a work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms

So now according to the given question:

Energy=2400 J

Time = 1 minute = 60 seconds

So we know from the definition of Power = Energy/Time

p=E/t

p=(2400/60) joules/ seconds

p=40 W