Simon
Gravity is pulling the parachutist downwards towards the Earth, while air resistance (or drag) is pushing upwards against the parachutist's fall, slowing down their descent.
The falling of a parachutist without his parachute deployed will be quite fast. We can slow his decsent by putting a drag on the free fall with a parachute. The fall is no longer free of drag (friction).
parachutist
A parachutist falling before opening the parachute experiences an acceleration due to gravity of approximately 9.81 m/s^2, which is the acceleration due to free fall. This acceleration causes the parachutist's velocity to increase as they fall towards the ground.
When a parachutist reaches terminal speed, the force of air resistance pushing up on the parachutist equals the force of gravity pulling the parachutist downward. At this point, the net force on the parachutist is zero, resulting in a constant velocity.
Leslie Irvin - parachutist - was born in 1895.
Leslie Irvin - parachutist - died in 1966.
James Miller - parachutist - was born in 1963.
James Miller - parachutist - died in 2002.
Gravity (downwards), and air resistance (upwards).
Parachutist Badge - Germany - was created on 1937-09-01.
The net force on the parachutist is 300 N (800 N - 500 N = 300 N) in the opposite direction of the parachutist's downward motion. This net force contributes to the deceleration of the parachutist as they descend.