Question

if a body have initial velocity of 10 metre per second and it attains a velocity of 20 metre per second in 5 seconds then its acceleration is​

Answer 1

Suppose the acceleration is a then using the second equation of motion, s=ut+21at2

and putting t=2sec and u=10m/s 

we get 20=10×2+a×2

or a=0 that is uniform motion.