Recent content by Za Kh

They are not given zero to us , they should be proved by calculation , but am not knowing how

A solid sphere

I haven't sensed a physical meaning to it yet in my head , but there's a formula that states tge summation of moments of inertia wrt x-axis ,y axis and z axis , respectively is equal to two times the moment of inertia at the origin . I think so .. Unfortunately i don't have enough time to...

How could we calculate the moment of inertia of a sphere , cut into half by the xoy plane ,, its supposed that moment of ineria about the xy and zy axes is zero , i want to know why

Now I understand , it has turned out that she meant the moment of inertia of the center of sphere and I thought it were the moment of an axis passing through the center , just because she hasn't specified clearly what she meant , thank you everyone :)

I want to show you the paper on my notebook but I don't know how to send a pic here

I know the moment of inertia for both a solid sphere and a hollow sphere is , but my teacher has derived a moment of inertia of the sphere but am not sure about what axis she was deriving it , and she got this answer 3/5 MR^2

The work done by a conservative force on a closed curve is zero but why it isn't true for the non conservative force?

Hi! I've figured this out, by the stocks theorem and that the work done by a conservative force on a closed curve is zero but why it isn't true for the non conservative force?

I know that if a vector field is conserved then there exits a function such that the gradient of this function is equal to the vector field but am just curious to know the reason of it.

i know the rules of finite expansion but i just want to know why do we need it and what does it mean ?

thanks ! :)

we learned about the impulse of a force , but just then a question came to my mind , what's the difference between the magnitude of a force and its impulse , or are they the same ... ??

Mmm I don't think so , so you mean that tension force is conservative when the rope can be recovered and returned to its normal condition right ?

why is the tension force of spring conservative and tension force of rope not conservative ??