The body falls freely from a height of 400 m. What is its speed at a height of 1.5 m?

To find the speed of a falling body at a height of 1.5 m, we will use the formula: Δh = h0 – h1 = V ^ 2 / 2g, whence we express: V = √ (2g * (h0 – h1)).

Constants and variables: g – gravitational acceleration (g ≈ 10 m / s2); h0 – height of the beginning of the fall (h0 = 400 m); h1 is the considered height (h1 = 1.5 m).

Calculation: V = √ (2g * (h0 – h1)) = √ (2 * 10 * (400 – 1.5)) = 89.27 m / s.

Answer: At a height of 1.5 m, the falling body will reach a speed of 89.27 m / s.