text: FACTORS AFFECTING LANDING PER- 
  FORMANCE. 
  In addition to the important 
  factors of proper technique, many other vari- 
  ables affect the landing performance of an air- 
  item which alters the landing 
  plane. Any 
  velocity or deceleration during 
  toll 
  will affect the 
  landing distance. As with 
  takeoff performance, the relationships of uni- 
  formly accelerated motion will be assumed 
  applicable for studying the principal effects on 
  landing distance. The case of uniformly ac- 
  celerated motion defines landing distance as 
  varying directly as the square of the landing 
  velocity and inversely as the acceleration dur- 
  ing landing toll. 
  
  landing 