Air resistance: When a parachutist jumps from an airplane, he eventually reaches a constant speed, called the terminal speed. Once he has reached terminal speed
A) his acceleration is equal to g.
B) the force of air drag on him is equal to zero.
C) the force of air drag on him is equal to g.
D) his speed is equal to g.
E) the force of air drag on him is equal to his weight.

Question

Quizplus · Accepted Answer

When a parachutist reaches terminal speed, the force of air drag is equal to his weight. This balance of forces means the parachutist no longer accelerates and maintains a constant velocity.

Air Resistance: When a Parachutist Jumps from an Airplane, He