Question

A jet plane has a takeoff speed of v10=75/ms and can move along the runway at an average acceleration of 1.3m/s2. If the length of the runways is 2.5 km, will the plane be able to use this runway safely?

Answer 1

Given,

acceleration, a = 1.3 m/s²

length of runway, s = 2.5 km = 2500 m

Let initial speed be u

let the final speed be v

We know,

v² = u² + 2*a*s

=> v² = 0 + 2*1.3*2500

=> v² = 6500

=> v = $\dpi{80} \sqrt{6500}$ = 80.62 m/s

Since, takeoff speed is given as 75 m/s

Hence, plane will be able to use the runway safely.