# Reason of no reaction force on a person in a lift falling freely under gravity

a person in a lift falling freely under gravity feels weightlessness because the force of reaction between the person and the plane with which he is in contact vanishes. why force of reaction vanishes? will the person not be in contact with the floor of the lift?

• It's not the contact touch between 2 surfaces that matters, but whether the body is going along a geodesic or not. Also see the equivalence principle – Avantgarde Nov 10 '18 at 16:34
• Do a free body diagram on the person in the lift when they are both in free fall and when they are not in free fall (lift suspended by a cable. That should give you your answer. – Bob D Nov 10 '18 at 16:58

The key point you need to realize is the person has acceleration $$g$$ in the first case and no acceleration in second case.