Recent content by Amru123

Now I get it.I've been in a false opinion all these days.Thanks for your help.

Next big revolution is going to be for water,food and oxygen.Because filthy rich might buy loads of water and store it when there is acute shortage leaving the poors horrified. Who knows? Even we might develope a new technology to trap oxygen for storage and then the filthy rich will use it as...

I have this kind of wish to do research on fields related to physics.I am interested in biology also.I read somewhere that radiology is a combination of both physics and biology.If so how much of radiology is physics and will I be able to do my wish of research if I get an M.D in Radiology? P.S...

It's the former."as long as".Except is not right.Just now referred a website.Kindly bare my blunder.

Oh my god! You are misunderstanding my question.I was reading a book at a neighbourhood library when I came across this statement "Force is independent of area of surface of contact except when the normal reaction remains the same" Which clearly means normal reaction makes force become...

I can't see the connection between how the "remaining same of normal reaction" makes friction become dependant on "area"

Friction is independent of area of surfaces in contact as long as the normal reaction remains the same.I agree that it does not depend and so says it's formula but the condition that it does when the normal reaction remains same looks odd to me..Can someone help me out to understand this?

We usually observe that in order to force a nail into a block we have to provide some support to the block.Can someone scientifically explain why we do it?

I got it! Thanks!

Thanks for that.

When work done is positive How does potential energy decrease? Work done and energy cannot have different direction can they? Can someone help me out in understanding this properly ?

Yeah,he did mention.Centre of mass is where the all the mass is assumed to be concentrated.Just look up for it's definition.

It was indeed about spring! Thanks a lot!

I don't seem to understand this formula. How there should a negative sign before the displacement.Can anyone help me out?

I remember my teacher saying it to be the axis along the centre of mass but the centre of mass has all the mass concentrated in it and hence moment of inertia should increase as moment of inertia is proportional to mass?