The rotor of a drone pushes air downward with speed at a rate of 1.80 kg per second
PHYSICS · Multi-part · A Level · Physics · Mechanics and materials · Mechanics and materials
Problem
The rotor of a drone pushes air downward with speed v at a rate of 1.80 kg per second. The mass of the drone is 1.50 kg. The drone hovers stationary in air.
(1) Describe the origin of the lift force on the drone.
(2) Calculate v while the drone hovers in air.
(3) Calculate the average power delivered to the air by the rotor.
(4) The rotor is made to rotate faster, increasing the lift force by 50%. What is the acceleration of the drone?