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### If an object is free falling under gravity, then where is the pseudo force applied? [duplicate]

If I am travelling in a train and the train accelerates forward then I experience a pseudo force backward. But if someone is free falling under gravity where does he experience pseudo-force because ...
68 views

### Equivalence principle and inertial frames [duplicate]

In Ta-Pei Cheng's Relativity, Gravitation and Cosmology book, he stated the equivalence principle as Physics in a frame freely falling in a gravity field is equivalent to physics in an inertial frame ...
60 views

### Why do we feel weightless on zero G planes? [duplicate]

I've heard of zero G flights, but why exactly do we feel weightless when we are in them?
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### Would lifting dumbbell in free falling lift be easier or harder?

Would it be harder to lift a dumb bell in free falling lift, where the dumbbell is falling with us or would it be easier?
729 views

### An inertial frame of reference observes an object on which the total force is zero but still has non-zero acceleration

Imagine a cup stuck to the floor of a falling elevator with the help of some impressive adhesive. In a frame of reference is this cup is being watched through the walls of a transparent elevator, this ...
105 views

### Equivalence Principle: Why is sitting in space the same as failling in a uniform gravitational field [duplicate]

The equivalence principle states that no experiment can determine whether one is being accelerated or if there is gravity present. This is insightful and intuitive. However, I was sort of surprised. ...
172 views

### Acceleration in free fall [duplicate]

A body in free fall "feels" no gravitational force (equivalence). Why does it continue to accelerate. Why is your program refusing my question?
256 views

### Does acceleration in free fall disprove Newtonian mechanics? [duplicate]

In Newtonian mechanics, how come the net force on an object in free fall is zero, yet it is accelerating?? If F=(a)(m), and F=0, it follows that: a must equals 0 But in reality a falling object will ...
280 views

### Fictitious force on a free falling body?

So I have read the first answer to this question and I have trouble making sense of the "Newton's explanation" part. If a person was inside a car moving on a straight road with acceleration of \$9.8ms^...
68 views

### Why is normal contact force acting on a person in an elevator during a free fall 0? [duplicate]

Since normal contact force between two surfaces depends on molecular interaction between them, then why does its value change with the acceleration of the elevator?
236 views

### normal force and fictitious force

From this answer https://physics.stackexchange.com/a/196166/147599 I have read that when we are free falling, the fictitious force cancels out the gravity pull so we'll feel no force. Would the ...
6k views

### why does a person feel weightless during free fall? [duplicate]

I want to ask why does a person feel weightless during free fall? Please give a specific and clear answer, without making it complex.