What is a Torque? (Rotational Mechanics - Physics)

[@worthlessman9214]

You really make physics easy TBH, Thanks to the KZbin algorithm that suggested me

[@PhysicsMadeEasy]

Hi, you are welcome. It is the goal of the channel to make everyone understand the basic concepts so that the viewer can then fly with his own wings!

[@sachinKumar-xv5hp]

Really sir you made easy to understanding

[@xadxtya]

Thank you

[@augijyotbali2131]

This is gold sir, keep making these ❤️

[@PhysicsMadeEasy]

Thank you Augijyot, will do!

[@physicslab5787]

Nice explanation

[@learningisfun889]

Thank you very much!

[@shreyaskannan6145]

Thanks alot!

[@saarausmaan]

Nice work....

[@ElVerdaderoAbejorro]

How do you know that the force applied is really directly proportional to the distance (ie, D^1) and not something really close to it, like D^1.001 ? I don't think the experiment would be able to detect such a small difference. This is the same question I have with many other laws, like Hooks Law. How do we know it is exactly F = K * X, and not K * X ^ 0.98 for instance? Is it possible to do a video on this subject?

[@PhysicsMadeEasy]

That is an unexpected (thus fun) question haha. It’s all a question of the propagation of an effect through a space with a given number of dimensions. F is proportional to displacement because in the two examples you gave, F and its consequences are acting in one dimension. A more conventional example to illustrate: Think about gravity. The gravitational field strength (g = GM/d^2) is inversely proportional to the square of the distance because the effect is dispersed (or diluted if you prefer) on a surface (that of a sphere, proportional to R^2). If we lived on Flatland (a 2D world), g would probably be inversely proportional to the distance only (dispersed along a circle’s perimeter, proportional to R). In a 4D world, g would be inversely proportional to d^3. Human’s can only conceive (physically in their minds) spaces of integer number of dimensions, this is why all physics formulas have formulas with integer powers. However, if you can think of an universe with fractal space (Dimensionality of sqr(2) ), and can figure out how physics works in such an universe, I am pretty sure you would end up with formulas containing fractional or real numbers as powers! Fun question!

[@ElVerdaderoAbejorro]

@@PhysicsMadeEasy That is an interesting reply. Thank you. :)

[@NaveenKumar-vx7yt]

👏👏👏👏👏🥇

[@hakeemjinna935]

Why sin theta and not cos theta ? Please explain

[@PhysicsMadeEasy]

Hello Hakeem. It is the component of the force perpendicular to the axis of the bar that acts on the rotation, this is why it is sin. You can use triangles if you want: sin(teta) = Opp/Hyp = Fperp/F, that gives you Fperp= Fsin(teta).