Question

Parachutes, aeroplanes and helicopters are able to travel in the Air which of the following properties of air is helpful in this case. A) Less density of air B) Pressure exerted by air C) Air occupies space D) All the above​

Answer 1

Answer:

The four forces acting on an aircraft in straight-and-level, unaccelerated flight are thrust, drag, lift, and weight. They are defined as follows: Thrust—the forward force produced by the powerplant/ propeller or rotor.

Answer 2

Answer:

All of the above thanks Keh ne ki zaroorat nahi hai