Suppose you are standing on a bathroom scale when you are flying in a jet airplane. for a moment the scale reads less than your actual weight. during that moment, it's exerting an upward force on you that is

Inertia

Explanation:

When the planes moves downward a speed, the weight of the person will decrease a bit due to the amount of g decreases for that particular instant. The person is now experiencing a less than actual weight called as apparent weight due to the upward superposition of inertia on the body as we can see in w = m g.