Question

three parachutist have reached terminal velocity at the same distance above the ground below. One at 50kg anoher at 40 kg an 75kg from fastest to slowest what is there total terminal velocities.Then from longest to shortest time rank their order in reaching the ground.

Answer 1

Do you understand what terminal velocity is?
It is the velicyt of a falling object during freefall, when it experiences zero acceleration. This is also known as resistance. This is because of air in the environment. Essentially, it will try to balance the falling objects weight
To help you answer this, let me explain this a bit. A human being will have a higher terminal velocity than a mouse. This is because the resistance in the air is proportional to teh falling bodies velocity squared.

There are other factors that influence this, but in general, air resistance is all you need to keep in mind since all you're given here is mass.