#78
Airplane start with initial speed
[tex]v_i = 0[/tex]
now the takeoff velocity is given as
[tex]v_f = 300 km/h[/tex]
[tex]v_f = 83.33 m/s[/tex]
acceelration is given as
[tex]a = 1 m/s^2[/tex]
now we have
[tex]v_f - v_i = at[/tex]
from above equation we have
[tex]83.33 - 0 = 1(t)[/tex]
[tex]t = 83.33 s[/tex]
#79
Airplane start with initial speed
[tex]v_i = 0[/tex]
now the takeoff velocity is given as
[tex]v_f = 300 km/h[/tex]
[tex]v_f = 83.33 m/s[/tex]
acceelration is given as
[tex]a = 2 m/s^2[/tex]
now we have
[tex]v_f - v_i = at[/tex]
from above equation we have
[tex]83.33 - 0 = 2(t)[/tex]
[tex]t = 41.7 s[/tex]
