Physics

Question

Help me Plz
can you solve the upper photo for me​
Help me Plz can you solve the upper photo for me​

1 Answer

  • 1) The acceleration of the plane is 1.89 times the acceleration of gravity

    2) The force acting on the airplane is [tex]2.22\cdot 10^5 N[/tex]

    Explanation:

    1)

    The acceleration of the plane is given by

    [tex]a=\frac{v-u}{t}[/tex]

    where

    v is the final velocity of the plane

    u is the initial velocity

    t is the time elapsed

    For the airplane in this problem, we have:

    [tex]u=0[/tex] (it starts from rest)

    [tex]v=200 km/h \cdot \frac{1000 m/km}{3600 s/h}=55.6 m/s[/tex] is the final velocity

    [tex]t=3 s[/tex] is the time

    Substituting, we find

    [tex]a=\frac{55.6-0}{3}=18.5 m/s^2[/tex]

    The acceleration of gravity is

    [tex]g=9.8 m/s^2[/tex]

    So, the acceleration of the plane relative to [tex]g[/tex] is

    [tex]\frac{a}{g}=\frac{18.5}{9.8}=1.89[/tex]

    2)

    The average force exerted on the plane is given by Newton's second law:

    [tex]F=ma[/tex]

    where

    F is the force

    m is the mass of the airplane

    a is the acceleration

    In this problem, we have

    [tex]m=12000 kg[/tex] is the mass of the plane

    [tex]a=18.5 m/s^2[/tex] is the acceleration

    Substituting, we find:

    [tex]F=(12000)(18.5)=2.22\cdot 10^5 N[/tex]

    Learn more about acceleration and forces:

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