The acceleration of a falling body weighing 10 kg at some point in time is 7m / s ^ 2.

The acceleration of a falling body weighing 10 kg at some point in time is 7m / s ^ 2. Find the force of air resistance at this point in time.

To calculate the value of the air resistance force at a given moment in time, we use the equality: m * a = Ft – Fcopr, whence Fcopr = Ft – m * a = m * (g – a).

Variables and constants: m is the mass of the falling body (m = 10 kg); g – acceleration due to gravity (g ≈ 10 m / s2); a – acceleration of the falling body (a = 7 m / s2).

Calculation: Fcopr = m * (g – a) = 10 * (9.8 – 7) = 28 N.

Answer: At a given moment in time, an air resistance force of 28 N. acted on the falling body.