Question

if body starting from rest and moving with constant acceleration covers 20m in the 3rd second distance travel in second will be

Answer 1

Answer:

24.5 m

Explanation:

u = 0 m/s      &       s = 20 m       &       t = 3 s

s = ut  + 1/2 at²      

s = 0 + 1 /2 at²

after 1 second

s1 = 1/2 x 9.8 x 1² = 4.9 m

after 2 seconds

s2 = 1/2 x 9.8 x 2² = 19.6 m

after 3 seconds

s3 = 1/2 x 9.8 x 3² = 44.1 m

so distance covered after 3 second is

s3 - s2 = 44.1 - 19.6 = 24.5 m