Linked Questions

3
votes
2answers
13k views

Why can't the units of work and torque be interchanged? [duplicate]

When I'm studying about work and torque, I found that their unit are the same. But, why don't we use Joule (unit of work) instead of Newton-meter (unit of torque)? Since $\mathrm{1\ Joule = 1\ Nm}$, ...
-1
votes
3answers
1k views

Over the definition of Joule in relation to a vector quantity [duplicate]

I was thinking about the unit of measure of the Energy (as well as Heat and Work) which is Joule $$\text{J} = \frac{\text{kg}\cdot \text{m}^2}{\text{s}^2} = \text{N}\cdot \text{m}$$ But again, ...
10
votes
5answers
4k views

Units don't match in the torsional spring energy!

According to Wikipedia's description of torsion springs and according to my understanding of physics the energy of a torsional spring can be written as $$U=\frac{1}{2}k \varphi^2$$ where $k$ is a ...
6
votes
3answers
17k views

Unit of torque with radians?

Usually, the angular frequency $\omega$ is given in $\mathrm{1/s}$. I find it more consistent to give it in $\mathrm{rad/s}$. For the angular momentum $L$ is then given in $\mathrm{rad \cdot kg \cdot ...
2
votes
4answers
3k views

Reconciling Units in Classical System Analogies: Why Does Torque Have Units of Energy?

In classical physics we often cast an analogy between translational and rotational systems Force < > Torque Energy < > Rotational Energy Momentum < > Angular Momentum and considering SI ...
0
votes
3answers
417 views

What is an intuitive explanation of units like $N \cdot m$? [duplicate]

Every quantity in Physics has a unit. These units can be in 3 forms: A single unit. An example is kg or m or J A division of two or more units. An example is $\frac{m}{s}$ or $\frac{m}{s^2}$ A ...
0
votes
5answers
455 views

The nature of torque as a vector

I can’t comprehend torque’s role properly: What is torque’s nature? Is it some kind of energy? Because its unit is (N.m) and (N.m) is similar to (Joules) and it's energy unit. As we all know “Torque” ...
3
votes
2answers
342 views

Wasted energy applying a torque

In another question I asked how find a way to deduce wasted energy, but I did not get a satisfactory answer. I have changed the setting here which brings us more close to the solution. Instead of a ...
0
votes
1answer
87 views

What do we mean, concretely, by the unit $\rm N\:m$ (newton $\cdot$ meter)? [duplicate]

What do we mean, concretely, by the unit $\rm N\:m$ (newton $\cdot$ meter)? For example, $1 \:\rm m/s$ mean that each second, we make one meter. Also, $1\:\rm m/s^2$ mean that each second the speed ...
0
votes
1answer
73 views

Thermodynamics of the Earth’s core

Wikipedia presents conflicting data in the article “Tidal Acceleration”. Hopefully one of you experts can clarify this. The torque on the Earth is measured at $3.9 \cdot 10^{16}$ yet the tidal ...
0
votes
2answers
40 views

Is Moment of force equal to work done by force and equal to gravitational potential energy? (M = W = g.p.e. )

Ridiculous question but... If these equations are true: Moment of force = force * perpendicular distance from pivot to force (M=Fd) And Work done by force = force * distance moved by force in the ...