A body weighing 1 kg, freely falling from a height of 100 m, hit the ground at a speed of 10 m / s. The air drag did the job.

To calculate the required work of the air resistance force, we apply the following formula: Asopr = Ep – Ek = m * g * h – m * V ^ 2/2 = (g * h – V ^ 2/2) * m.

Constants and variables: g – gravitational acceleration (g ≈ 10 m / s2); h – fall height (h = 100 m); V – impact speed (V = 10 m / s); m – body weight (m = 1 kg).

Calculation: Asopr = (g * h – V ^ 2/2) * m = (10 * 100 – 10 ^ 2/2) * 1 = 950 J.

Answer: The force of air resistance did the work of 950 J.