By definition, we have to:
\(vf = a * t + vo
\)
Where,
vf: final speed
a: acceleration
t: time
vo: initial speed
Clearing the acceleration we have:
\(a = \frac{vf-vo}{t}
\)
From here, we substitute values.
We have then:
\(a = \frac{230-245}{7}
\)
\(a = -2.14 \frac{m}{s^2}
\)
Rounding to the nearest whole number:
\(a = -2 \frac{m}{s^2}
\)
Answer:
the acceleration of the plane is:
\(a = -2 \frac{m}{s^2}
\)
Note: the negative sign indicates that the plane is slowing down.
