A 750 kg National Geographic Drone is rising vertically up into the atmosphere at constant speed. The lift force pushing it upward is 125% of its weight. The drone reaches the cruising speed almost immediately. It takes 25 seconds for the drone to reach a height of 250m starting from the surface. a. What is the mechanical energy of the drone at the surface? b. What is the mechanical energy of the drone at the 150 m height? c. Is the mechanical energy of the drone conserved, increased, or decreased. Explain your choice. d. What is the work done by each force acting on the drone?
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