All Questions
6
questions
2
votes
1
answer
2k
views
What happens to a person in an elevator with a downward acceleration greater than $g$?
So I've been learning about the apparent weight of a person in an elevator accelerating upwards or downwards. I learnt that:
If it accelerates upwards with an acceleration a, Apparent weight = m (g+a)...
- 492
-3
votes
1
answer
154
views
Accelerating downwards faster than gravity
What would happen if you were in an elevator that was falling downwards with a acceleration and a>g? I found an answer on this site that said that you'd hit the ceiling of the elevator. I ...
- 801
-1
votes
3
answers
609
views
Force of Gravity and $F=ma$
Imagine a box on a table. It should have $F_g$ downward and $F_N$ upward.
(I do get that we have to add those forces.)
However $F=ma$ and the box's mass is constant.
How is $F_g=mg$ if the box's ...
- 27
0
votes
2
answers
277
views
Newton's 3rd law and normal force
There is something I hope you can help me understand...
According to my physics course, when I stand on the surface of earth, the normal force prevents me from "falling down" because it's ...
- 33
-2
votes
4
answers
2k
views
How can one say that an object is at rest when there is a constant acceleration $g$ acting on it?
A stationary object in a gravitational field, or a stationary charged particle in an electric field, has potential energy. If there is a constant acceleration, following this logic, how can I be at ...
0
votes
1
answer
1k
views
What will be the acceleration of an object $A$ when its released by another object $B$ moving with an upward acceleration $a$?
What will be the acceleration of an object $A$ when its released by another object $B$ moving with an upward acceleration $a$? Will the acceleration of the object $A$ be more than the acceleration due ...
- 167