Question

a body starts moving from rest with an acceleration of 4ms^-2 find its velocity after 4 second

Answer 1

Body starts from rest so u=0

v=u+at

v=0+4*4

v=16m/s

Answer 2

using the equation ie. v= u + at nd putting the values, v = 0 + 4*4 ,gives, v= 16 m/s,the body initially being at rest will have u = 0 hope it will help