Question

As the skydiver falls to Earth, she experiences positive acceleration due to
Your answer:

gravity.
inertia.
friction.
air resistance.

Answer 1

It is gravity. As a sky diver falls (ignoring air resistance for now) he increases in acceleration due to gravity, or 9.81m/s^2 (Earth's gravitational acceleration). Inertia is, by definition, a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force (credit to Google). However, if the sky diver has some kind of webbing on his suit, a drag force opposite to gravitational weight cancels it, and it moves at a constant drag velocity.

Sorry I got carried away... physicist...

It is gravity. Hope this helps!

Answer 2

Explanation :

When an object moves under the action of gravity. Then the object is said to be moving under free fall.

We know that the acceleration due to gravity is denoted by g and it is equal to $9.8\ m/s^2$.

If the body is accelerating towards the gravity the value of g is positive while when it is accelerating against the gravity it is negative.

As the skydiver falls to Earth, she experiences positive acceleration due to gravity.

So, the correct option is (a) gravity.