Question

aeroplane running along Runway for 15 seconds and takes off at a speed of 100 M per second find the length of Runway and acceleration of plane

Answer 1

hello my friend !

as stated in question the final velocity v is 100

initial velocity u is 0

acceleration = 100-0/15sec
=20/3 m/sec^2
by second equation of motion
s = ut+1/2at^2

s= 0×15 + 1/2 × 20/3 ×15^2
s= 20/6 × 225
s= 750 m

length of runway must be equal to or greater than 750m

acceleration is 20m/sec^2