a jet egine developed 69kN of thrust while propelling a small plane at 59.0 m/s?

Question

how mu(MW)ch power did it produce

Answer 1

In one second the plane will go 59 meters thanks to the exersion of 69 kN of force. The work done then is
W = F*d = 69 kN * 59 meters
W = 4071 kN-meters = 4071 kJoules

Power is the rate of doing work, W/t. Since the above was figured for one second, the power is
P = 4071 kJoules / sec = 4071 kWatts = 4.071 megaWatts