Aeroplanes are made to run on runway before take-off because it ………
A. decreases friction
B. decreases viscous drag of air
C. decreases atmospheric pressure
D. provides required life to the aeroplane
Answer:D
Aeroplanes are made to run on runway before take-off because it ………
A. decreases friction B. decreases viscous drag of air C. decreases atmospheric pressure D. provides required life to the aeroplane