Recent content by asdofindia

And I'm also asking if gravity is not centripetal force, what's keeping us glued to Earth on the equator where we ARE doing a curved motion. You saying friction?

yeah, i was talking at the equator.

So the centripetal force is...?

oh yeah. i had it wrong. proton is just a current. it'll induce a magnetic field around. no electric field. you're right. it won't slow down assuming the loops is uniformly neutral.

Centripetal force, Fg=GMm/r2 Centrifugal force, Fr=mv2/r So, when v is > vmax where vmax> \sqrt{GM/r} we do fly away! If it's \sqrt{2} times the vmax in the above equation, it'd escape Earth's gravity too (because that'd be 11.2 km/s) If v/vmax is between 1 and \sqrt{2}, it'd fly away and...

That makes me wonder whether or not to subtract mv2/r from GMm/r2 when calculating the weight of a body Edit:http://en.wikipedia.org/wiki/Centrifugal_force_%28fictitious%29#Earth" Appears like there are effects due to centrifugal force

See, if we draw a free body diagram. We'd draw an arrow from the man to the centre, calling it centripetal force. And another opposite to it calling it centrifugal force, right? I thought they'd cancel, but I don't think I've clearly finished that thought process, I made a quick reply... And...

Imagine a magnetic sphere. Rotating. Imagine a sticky man on it with iron legs. Let's say he already has acquired the velocity of the point right under his legs. At every point, the man's velocity wants him to go tangential to the surface, to be thrown away from the sphere. But the magnetic...

Add to that betterexplained.com and you can see the beauty of mathematics. Putting the right signs need insights (or damn sharp concentration) Connecting the real physics with math helps. like, if you have to add two areas above and below the x-axis, maths will give you the difference...

E = 0.3sin(x-wt) + 0.7[sin(x - wt) + sin(x + wt)], = 0.3 sin(x-wt) + 0.7[(sin x cos wt - sin wt cos x) + (sin x cos wt + sin wt cos x)] = 0.3 sin(x-wt) + 0.7[(sin x cos wt )+ (sin x cos wt )] = 0.3 sin(x-wt) + 0.7[2(sin x cos wt )] = 0.3 sin(x-wt) + 1.4 (sin x) (cos wt) = the traveling wave...

Virtual object on a mirror?

What's that flow out doing there in the diagram? If air doesn't flow out at the same rate, it's obvious that the pressure inside increases. If it IS flowing out at the same rate, it may be that the bubbling in the water causes some of the water molecules to come out of the liquid, and...

The proton will slow down. I think I2R will be the energy lost by the proton.

I thought conservation of angular momentum was applicable only to a rigid body rotating on its own axis. In that case we'd have to be glued to Earth's surface from time immemorial. (But that's what the gravitational force and friction do. Gluing us to the surface) So, the answer is a...

MIT OCW is a source of hope and inspiration for a lot of people (at least me) around the world. Even if he's bluffing like Einstein, I wouldn't mind. The answer to the original question: "If you've understood everything about Kirchoff's rule, Physics won."