Question

An aeroplane has a run of 500 m to take off from the runway. It starts from rest and moves with constant acceleration to cover the runway in 30 sec. What is the velocity of the aeroplane at the take off ?

Answer 1

Given: Length of runway (s) = 500 m, t = 30 s 

To find: Velocity (y)

Formulae. i) s = ut + 1/2 at² 

ii) v = u + at

Calculation: As the plane was initially at rest, u = 0 

From formula (1),

The velocity of the aeroplane at the take off is 120 km/hr.