All Questions
15
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1
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What is difference between normal force and reaction force? [duplicate]
according to my book the perpendicular component of reaction force is called normal force when there is contact between two bodies. I can not understand that how for example when we jump we pushes the ...
user379089
0
votes
2
answers
175
views
What is normal force and when it acts?
what are contact forces and according to: https://www.physicsclassroom.com/class/newtlaws/Lesson-2/Types-of-Forces
it says there are 6 types of contact forces. I am having doubt with applied force and ...
user379089
5
votes
6
answers
2k
views
What actually is impulse?
In my textbook it is mentioned that “impulse is used to get an idea of about the change in dynamical state of a moving particle”,but what does impulse actually mean?
- 79
1
vote
4
answers
199
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Is "force" and "exerting a force" the same or different things?
Is "exerting a force" and "force" the same or different things?
Either it your answer is "same" or "different" give an explanation for this.
How this doubt came ...
user316791
0
votes
1
answer
267
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Why is electromagnetism considered a non-contact force?
The four fundamental forces (gravity, the strong force, the weak force, and electromagnetism) are all supposed to be non-contact forces. Yet, electromagnetism governs all contact forces between ...
- 13
2
votes
1
answer
2k
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What is a non-fundamental force?
We all know of the four fundamental forces, gravity, electromagnetism, strong, and weak. However, is there such a thing as a non-fundamental force, and if so, what is the definition of such a thing? ...
- 1,252
2
votes
2
answers
318
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What is meant by "inertial forces", in contrast to the "resultant force"?
For example, in the Wikipedia page on Reynolds number it is said:
The Reynolds number is the ratio of inertial forces to viscous forces within a fluid..
In explanations of the Reynolds number, it is ...
- 903
5
votes
4
answers
6k
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What's the difference between normal and reaction force?
Learning about forces and frictions at the moment, one things I can't seem to grasp is what is the difference between the normal and reaction force? They both act perpendicular to a surface and away ...
- 217
0
votes
1
answer
250
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What is the difference between the applied, external force and the generalized force?
in analytical mechanics, we define the generalized force using the applied force times $dr/dq$. If I want to express the difference between the external and generalized force in words in order to ...
1
vote
2
answers
869
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Does Lorentz force only refer to the force described by the Lorentz Law?
I'm sorry for my very stupid question. I'd really appreciate some help.
I'm just rather confused on what the Lorentz force actually is. So my question is, simply put - what is the Lorentz force? ...
- 23
0
votes
1
answer
602
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A question about central forces
Will a force pointing towards a fixed point but having constant magnitude (and not depending on the distance from fixed point) be a central force?
- 43
3
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2
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535
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Isaac Newton and Definition of Force
Isaac Newton in Principia Law II says:
"the change of motion is proportional to the motive force impressed, and takes place following the straight line in which that force is impressed". "If some ...
- 31
-2
votes
1
answer
1k
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What is the difference between the Lorentz force and the ponderomotive force? [closed]
I understand that Lorentz force is due to motion of moving charged particle in a magnetic field, and I imagine that ponderomotive force is mechanical version analogy to a person surfing on a wave ...
- 13k
9
votes
2
answers
10k
views
Why is Newton's third law known as *weak law of action and reaction*?
This link shows the extra requirements for strong law of action and reaction. Why is Newton's third law known as weak law of action and reaction? Is the strong law of action and reaction not Newton's ...
- 2,754
0
votes
4
answers
90
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Who is said to do Work, me or the body?
If I subject my force to a body and it is displaced then the work is said to be done. What is that work done by? Is it said to be done by me or that body?
user73555