All Questions
4
questions
8
votes
5
answers
607
views
Why is torque defined as $\vec{r} \times F$?
Here I cannot convince myself myself that it is units because the torque is defined to be in units of Newton meter is a reiteration of the law stated above. Why was it not $r^2 \times F$ or $r^3 \...
- 460
0
votes
3
answers
161
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The unit of Torque [duplicate]
Whenever we define a physical quantity, we know what 1 unit of that quantity tells us. For example, when we say 5 Pa, we're saying 5 N force acts perpendicularly on every unit area of the material but ...
- 87
1
vote
1
answer
3k
views
Why is moment of a force calculated by cross product?
Why the moment of a force is calculated by the cross product of two vectors,how it is related ? And what does it means ,when I said that moment of a force about a point is for example 6 N.m ? I want ...
- 47
5
votes
2
answers
394
views
Does a central force have to be independent of angle?
When defining a central force, some sources, like Wikipedia, say that the magnitude of the force only depends on the distance $r$:
In classical mechanics, a central force on an object is a force ...
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