Question

(a) Draw a velocity-time graph for an object in uniform motion. Show that the slope of
velocity time-graph gives acceleration of the body.
(b) An aeroplane starts from rest with an acceleration of 3 ms–2 and takes a run for 35 s before
taking off. What is the minimum length of runway and with what velocity the plane took off?

Answer 1

heya
here is your answer

(a)this is the velocity-time graph for uniform motion.
slope of this graph = velocity*time = acceleration.
so the slope of the body gives acceleration.

(b) according to the question
u= 0m/s
a= 3 m/s²
t= 35sec
so s = ut+½at²
= 0*35+½*3*35*35=1837.5m=1.8375km

hope this will help you
any further doubt ask me anytime
please like my answer if it is helpful

thank you

-sneha
love to help

Answer 2

in (b) she had not founded the v of plane
v=u+at
v=0+3*35
v=105m