The body fell without initial speed from a height of 21.5 m for 2.1 s. Find the acceleration of body movement.

To find the acceleration with which a given body moved in the fall, we will use the formula: h = a * t ^ 2/2, whence we express: a = 2h / t ^ 2.

Variables: h – fall height (h = 21.5 m); t is the duration of the fall (t = 2.1 s).

Calculation: a = 2h / t ^ 2 = 2 * 21.5 / 2.1 ^ 2 = 9.75 m / s2.

Answer: The given body should have been falling with an acceleration of 9.75 m / s2.