All Questions
Tagged with newtonian-gravity free-body-diagram
10
questions with no upvoted or accepted answers
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30
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Can a thin pole break or be cog-sensitive under the influence of gravity?
When we consider such a phenomenon, what I am wondering is that the body of an object having a thin radius seems to cause the center post to be broken or the cog to be very sensitive, but why should I ...
- 49
1
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1
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89
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In simple terms, why does a skateboard slide in the opposite direction of its falling rider?
I would like to have a better understanding of something I’ve observed:
If I stand on a skateboard at rest, there is no movement.
If I lift my left leg, my body of course starts to fall to the left, ...
- 11
0
votes
1
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39
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Air Friction Newton III
I have question to the Newton III Law and Air Friction.
At the free Fall of a Body there is an Air Friction, which is in oppopsite direction to the Gravitation Force. In my opinion the Body pushes to ...
- 1
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Dynamic equilibrium of planets
We can describe statical equilibrium ( forces, moments ) in a cuboid $$ \Sigma F_x=0,\Sigma F_y=0,\Sigma F_z=0~$$ In dynamics can we describe similar dynamic equilibrium within an inertial ...
- 1,032
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Question about applying Maxwell's Equations to analyze a copper shaft and magnetic bearing
fellow physics people I have a question regarding the mathematics behind how a magnet will slow down as it falls through a copper pipe. I am aware of the mechanism in which this works, the falling ...
- 9
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2
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277
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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
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141
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*All* forces in stacked objects on ground
I want to reference the first answer to this previous question:
How is an object kept on a table is at rest?
First, the problem I'm actually working on is a mat sitting on the ground and a box ...
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votes
2
answers
122
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Scale readings, the definition of weight, and projectiles
For this question I would like to define weight as a scale reading. I have a conceptual question: if I leap off a scale, according to my definition of weight the scale will claim I am heavier than ...
- 205
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1
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91
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Dividing tension of a string in pendulum and then calculating with weight
One of my teachers in my school showed me a way to calculate the force acting on a pendulum. He did it in two ways:
W= weight of bob
T= tension of string and its length cannot change
A= The angle ...
- 1,400
0
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1
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Does it only matter that the radial force is equal to the centripetal force, not the net force?
In the picture above, why is it only necessary that the net force in the radial direction is equal to $\frac{mv^2}{r}$ for the object to complete circular motion? What about the component of gravity ...
- 101