At 2.5 seconds the helicopter has a kinetic energy of 20 j. what is the mechanical energy at that time?

michael joseph jackson was an american singer, songwriter, and dancer. dubbed the "king of pop", he is widely regarded as one of the most significant cultural figures of the 20th century and one of the greatest entertainers of all time.

brainliest

answer; soren kieregaard was a 19th century danish philosopher;