All Questions
Tagged with newtonian-gravity free-body-diagram
137
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Why does $g$ become 0 for this question?
A body went up for $4 \;s$ in air and then down for $4 \;s$ with the total journey of $8\;s$. Now, the graph above is a $a-t$ graph for the statement.
My question is that why does $g = 0$ when the ...
- 33
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1
answer
325
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Analyzing pulleys via Newton's Laws of Motion
If we consider a simple case like the following we can write the acceleration of the block as
$(m2-m1)g/(m1+m2)$ considering that $m2$ is heavier than $m1$
It is possible if the pulley is ...
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3
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Tension and force equilibrium analyzed via Newton's laws of motion
I was recently solving my workheets to apply basic concepts of Newtonian mechanics. I came came across the following problem.
The above is under equilibrium. The solution the book gave me was as ...
-1
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3
answers
609
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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
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Relationship between gravity and density
So I have recently found that flat earthers believe gravity is not real and everything goes down because of densities, obviously, if this were true things would float up as our air is not very dense, ...
- 340
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1
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When some mass does vertical upward motion, which direction is the direction of the inertial force?
When I throw a ball upward on the earth, at a later time, that ball would be in the condition of $v=0$ (at the highest position) and then finally it would fall. If a ball falls, its direction of ...
- 19
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Elevators and counter weight
In case of elevators we have motor attached to pulley, which has counter weight on one side and elevator car on the other side. Now let us say if elevator car is of 100 kg and counter weight is of 150 ...
- 11
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498
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Point particle sliding down an arbitrary curve (no departure)
Consider a point-particle $p$ on an arbitrary curve defined by the function $f(x)$. It's constrained to always live within the curve. I.e; it always has coordinates $(x, f(x))$ and hence cannot "...
- 690
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Is it possible for a particle to slide on a frictionless sphere and orbit the sphere? [closed]
We are in an isolated system consisting of a large massive smooth sphere/planetoid with radius $R$ and due to its mass an nearly constant acceleration $g$ exists in its vicinity.
A small particle is ...
- 1,270
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What are all the forces a person is subjected to in a G force simulator centrifuge?
Question
What are all the forces a person is subjected to in a G force simulator?
Details
In a G force centrifuge a test pilot is exposed to high G forces, however recently I've been learning about ...
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Holding a really heavy object in front of you
If you have inhuman strength, is it possible to hold an object way heavier than you with your arms forward horizontal while standing with no anchoring? Or will the object simply make you fall forward ...
- 1
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405
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Why Humans can't carry themselves? [closed]
I have been lately questioning why if someone carries you can't carry him at the same time. basically, I don't really know if it's possible at least physically and not limited by humans abilities. ...
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3
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What is the weight of body on inclined plane? [closed]
If weighing machine is kept on inclined plane,and a person measures his weight on the scale,will he get less or more weight on scale
Acc to me mg cos theta will be shown in the weighing scale, so if ...
- 29
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28
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Does normal force at various instant have any effect on the acceleration or retardation of ball?
If there is a Body rolling on a frictionless smooth surface.It a double inclined plane.
We say $h$ of the Body initial is = final (Nearly) h = h’
We also see that normal force is changing at every ...
user280997
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5
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Why don’t we feel weightless on airplanes?
If we feel weightless because there is no contact force acting on our bodies. Then why are there no contact forces for people in the international space station but there is for people on airplanes?
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