Question

If a body starts from rest and travels 120cm in the 6th second , with constant acceleration then what is the acceleration

Answer 1

Answer:

0.218 ms⁻²

Explanation:

If a body starts from rest and moves with constant acceleration, then the distance travelled by it in nᵗʰ second is given by:

Sₙ = a/2 (2n-1)

∴ 1.2 = a/2 ( 2×6-1 ) [∵120cm = 1.2m]

∴ 1.2 = a/2 (11)

∴ a/2 (11) = 1.2

∴ a/2 = 1.2/11

∴ a/2 = 0.109

∴ a = 0.109 × 2

∴ a = 0.218 ms⁻²