Initial data: h1 (initial body height) = 17 m; h2 (considered body height) = 12 m; the fall of the body is considered free (V0 = 0 m / s).
Reference values: g (acceleration due to gravity) ≈ 10 m / s2 = a (acceleration of the body).
The speed that the body will have at a height of 12 meters is determined by the formula: S = h1 – h2 = (V ^ 2 – V0 ^ 2) / 2a = V ^ 2 / 2g, whence V = √ (2g * (h1 – h2 )).
Calculation: V = √ (2 * 10 * (17 – 12)) = √100 m = 10 m / s.
Answer: At a height of 12 meters, the body will have a speed of 10 m / s.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.