Answer: 7.8×10^5 J
Explanation:
Total energy = kinetic energy of plane + gravitational potential energy of plane.
Total energy = ((1/2)×m×v²) + (m×g×h)
Here, m is mass of plane, v is velocity of plane, g is acceleration due to gravity and h is height above the ocean.
Now,
Total energy = ((1/2)×m×v²) + (m×g×h)
Total energy = m((v²/2) + (g×h))
Total energy = 850((38²/2) + (9.81×20))
Total energy = 850(722 + 196.2)
Total energy = 7.8×10^5 J
