Question

A body starts moving with an initial velocity of u m s–1 and an acceleration
of 4 m s–2. If the distance travelled by it is 20 m in the 2 second, then the
value of u is

Answer 1

Answer:

search in google dude..u can find answer easily

Answer 2

Explanation:

Initial velocity  u=5 m/s

Acceleration   a=1 m/s2

Distance covered in 5th second,   S5=u+21a(2t−1)

where  t=5 s

∴   S5=5+21(2×5−1)=9.5 m