Correct Answer : meter
Explanation : Specific energy is defined as the ratio of total energy to the weight of the aircraft. Specific energy is defined by distance unit. It can be meter, feet etc. Meter per second is the unit of velocity or speed. Newton is standard unit of force.
Correct Answer : Option (D) : 147.6
Explanation : Average velocity at Flare = 1.23*stall speed = 1.23*120 = 147.6 knots.
Correct Answer : Option (C) : 26.4 unit
Explanation : For military aircraft, Approach speed = 1.2*stall speed = 1.2*22 = 26.4 unit.
Correct Answer : Option (A) : 90.90
Explanation : Stall speed = touchdown speed/1.1 = 100/1.1 = 90.90.
