1 answer
(click or scroll down)
The time of flare falling down t=8 s = >
The flare fell from the height h=gt²/2 =9.8•8²/2=313.6 m
since the time of accelerated helicopter motion is t1 =25 s,
its acceleration was
a=2h/t1²= 2•313.6/25²=1 m/s²
The helicopter gets off by the height Δh during 8 seconds,
Δh=a•t1²/2 =1•8²/2 =32 m
H=h+ Δh=313.6+32=345.6m