Question

i)
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 ?
[Ans: 120 km/hr]
vii)​

Answer 1

Explanation:

v=u+at

u=0

a=v/t

v^2-u^2=2aS

v^2=2(v/t)S

v(v-2s/t)=0

v=0

or

v=2s/t

v=1000/30

v=33.33m/s or 120km/h