Question

What is the total energy of a 850 kg sea plane flying at 38 m/s and 20 m above the ocean?

Answer 1

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