Question

An object travel with the acceleration of 3m/second . If it's initial speed was 4m/second how much it travels in 8th second???

Answer 1

S=u + a/2(2n-1)
= 4 +3/2(2×8-1)
= 4 + 3/2×15
= 4 + 1.5×15
= 4+ 22.5
= 26.5


hope it helps