Answer:
Power developed by a model rocket engine will be 73.3 watts. Power is the ratio of the work done or the enrgy to the time period.
What is the power output?
The rate of the work done is called the power output. It is denoted by P.Its unit of a watt.
E is the energy = 66 J
P is the power output =?
t is the time period = 0.9 sec
The power output is given as;
p = E
t
p = 66
0.9
P=73.3 watt
Hence power developed by a model rocket engine will be 73.3 watts.