Question

A body is moving with velocity 15m/s and it travels 250m in 9seconds. Find the velocity of 9 seconds and displacement of 5th second.​

Answer 1

u=15

s=250

t=9

v=?

s=ut+1/2at²

250=15×9+1/2a×9²

250=135+81a/2

250-135=81a/2

115×2=81a

230/81=a

v=u+at

v=15+230/81×9

v=15+230/2

v=15+115

v=130

s= v-u

s= 130-15

s=115