A body falling under gravity covers two points A and B separated by 80 m in 2s. The distance of upper point A from the starting point i s ________ m (use g = 10 ms⁻²)

Question

G1 Physics · Accepted Answer

Image From A to B: 80 = v₁t + ½gt² 80 = 2v₁ + ½ × 10 × 2² ⇒ 80 = 2v₁ + 20 ⇒ v₁ = 30 m/s From O to A: v₁² = u² + 2gS 30² = 0 + 2 × 10 × S ⇒ 900 = 20S ⇒ S = 45 m