Question $4-25$ marks The engines on the plane shown in the image generate a thrust force $F_T$ according to the following equation: $F_T=F_o(1-\frac{v}{b})$ Here, $v$ represents the plane's velocity, $F_o$ and $b$ are constant values, and $b$ is always greater than $v.$ The plane has a mass $m.$ The plane starts at rest at time $t=$ A$.$ As the plane moves down the runaway, the thrust force must overcome the drag force and the velocity must be increasing with time leading up to take$-$off. Explain how this can be true based on the equation above.