A person descends on a parachute moving evenly. The force of gravity of a parachutist

A person descends on a parachute moving evenly. The force of gravity of a parachutist with a parachute is 700 N. What is the force of air resistance

uniform movement
gravity = 700 N
air resistance unknown
solution
use Newton’s 3 law!
according to Newton’s 3 law, the force of gravity is equal to the force of resistance and will also be equal to 700 N.
1) F thrust = m * g where m is the mass, g is the acceleration of gravity.
2) Fcopr = m * (a + g) a-acceleration, but the movement is uniform, so the acceleration is 0.
from formula 1, we find the mass of a person m = F / g, that is, 70 kg (700 N / 10)
from formula 2 we find the resistance force F = 70 (0 + 10) = 700 N
answer: 700 N