Question

Even after the discovery of general theory of relativity ?
why we still use Newtons Gravitational theory for objects falling on earth :P

Answer 1

hope you know both theories :)

Answer 2

Because it is easier to fall using Newton's Theory. It would hurt less when you know for sure that you are simply going to get hurt than trying to mess up with several complex equations and not understanding a word and finally getting hurt after so much mess.

No need to thank me guys ;)

Answer 3

Yes it is... I have been awarded Noble prize for this theory... :D

Answer 4

haaa haaa LOL :P

Answer 5

:D

Answer 6

But on a serious note it is mainly due to sake of understanding

Answer 7

@Astrophysics did u get what my question mean ?

Answer 8

From my understanding they only differ in predictions...

Answer 9

It is very easy to study the motion of objects under near about constant acceleration (which doesn't has so much large vale). The speed of the object during fall is also very less than the ones which we refer to as considerable for relativistic motion. Such simple and small speeded motions (due to air drag the objects attain a terminal velocity) newton's law can very easily and much accurately solve and describe the motion.

Answer 10

what Einstein says is its pus from the outer space so the apple or whatever falls to the eath and what newtons says its pull from the earth towards itself :P
which one is True PUSH OR PULL ;P

Answer 11

Actually from the apple's perspective nothing matters. It is going to hurt very badly and that is the most important thing. You give it a parachute and then we will think about it. It is a living being after all :P

Answer 12

Well Physics says to think from different reference frames :D

Answer 13

Lol well I'd say, Newton would probably agree with Einstein if he had the chance, remember how many centuries before was Newton, maybe it was the lack of terms, and what Newton meant was the same as Einstein...but I think Newtons laws are fine for distances where it doesn't consider light years, but beyond that Einstein it is!

Answer 14

@vishweshshrimali5 Once the apple is detached from the tree only seed inside it is living. The flesh we eat is just stored food. :p :D

Answer 15

You try telling the apple this @Abhisar :D

Answer 16

Actually there are some other horror movies...uhm .. sorry I meant theories for gravitation. One of them being Newton's law of gravitation and other being the one with the spacetime curvature theory based on general relativity.

Even though they have different names, they both basically convey the same ideas through different set of ideas, laws and equations

Answer 17

I think the reason is same for which we don't apply wave nature of material on daily use materials.

Answer 18

General relativity principle and thus the space time curvature theory is much better to understand and use when we are dealing with extreme motions.

As @Abhisar mentioned, the matter waves associated with a matter (due to De Broglie's wavelength) are very small due to their momentum.

There are other similar reason for using a particular law for a particular set of cases

Answer 19

i agree with you @Astrophysics :)

Answer 20

Actually what is more crucial is that Einstein helped Physicists (the mad ones basically) in studying the relativistic principle and Newtonian principles for gravitation together.

A little similar difference is present in Newtonian mechanics and quantum mechanics. Though both basically deal with mechanics, both differ in the sizes of the particles they are studying and dealing with

Answer 21

Well also I want to add Einstein general theory of relativity is more of an add on to Newtons law of gravitation, one must learn that before they jump to relativity, what was it Newton said?

"Only reason I got this far was by looking from the shoulders of giants" Something like that :P, they are both good to learn, but differ a bit on their predictions.

Answer 22

We cannot use quantum mechanics for solving Simple pulley problems :)

Similarly we don't use (not sure of *cannot*) for small level falling objects

Answer 23

ahaaaa

Answer 24

Just my views ^^^^

If you want to award me some Noble Prize or any Field prize.... you all are most welcome :D ;) :P

Answer 25

I think the relativity theory is useful for objects in near (or approaching) speed of light.

Answer 26

nice @Abhisar

Answer 27

Correct on that @Abhisar . Many concepts like length contraction and time delaytion can only be explained for such bodies :D

Answer 28

Well I will have to guys...... Enjoy the discussion :D

Bye !!

Answer 29

bye @vishweshshrimali5 ! :)

Answer 30

@Astrophysics ? Say something LOL and thanks @vishweshshrimali5

Answer 31

Haha sorry, I was messaging someone xD, yeah what I was basically saying before, Einsteins theory is more for distances that deal with light years and such, where as Newtons are more for everyday things that are just around the block (including solar system). But it's important to know both, you have to remember both of these theories were observed, rather than derived.

Answer 32

thanks :P

Answer 33

Np ^.^

Answer 34

scientists dont use newton,s theory now................it is just taught in schools and colleges to give students primary idea about physics

Answer 35

no, we should start using quantum mechanics for pulley problems. it's efficient

Answer 36

Newton formulated some laws of motion that seemed to explain the reality we observe around us. For two hundred years and more, they seemed to fit the bill. Then, as science started to push the boundaries a little harder, one or two cracks appeared. So Einstein offered a new explanation, one that didn’t just show where Newton was not quite right, but showed why Newton had appeared to be right under the circumstances we had thus far encountered.

Doubtless, at some time in the future, physics will be able to show where Einstein’s explanation wasn’t quite the complete one either. That doesn’t mean that there will be any conflict with, or loss of respect for Einstein.
General relativity is simply an improvement over Newtonian physics.

There are two main differences which lead to different results in case the gravitational field is very strong or velocities are very high.
Unlike in Newtonian theory gravity does not act immediately but acts with the speed of light.
In General Relativity the gravitational potential is effected by relativistic effects.

hope this helps :)