Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

  • Kinematics & Rotational Motion
  • View Details
Get extra R 150 off


What is the principle of Relativity?

7 years ago


Answers : (2)


The principle of relativity is not a new concept for us. We have seen that all framed of reference the move with uniform velocities with respect to an inertial frame are themselves inertial. Newton’s laws of motion are valid in the same form in all such frames. Standing on a railway platform, you can drop a stone in such a way that it hits your left foot. If you repeat the same experiment in the rain moving smoothly with a uniform velocity, the stone will again strike your left foot. One cannot distinguish between two inertial frames by repeating the same experiment in the two frames. No experiment done inside the train can tell whether the train is at rest at the platform or is moving at 120 km/h with respect to the platform provided there are no jerks, the train does not speed up or speed down and it does not bend.


This is the principle of relativity. There is not preferred inertial frame. All frames are equivalent. The motion between two frames is relative- you can chose any of the frames and call it at rest and the other in motion.


We can understand this on the basis of Newton’s laws of motion. These laws have the same form in all inertial frames. Whether you measure acceleration, force and mass on the platform or on the train, force always equals mass times acceleration. As the results of experiments are governed by Newton’s law, identical experiments will give identical results irrespective of the frame involved. But Newton’s laws govern only the experiments of mechanics! You can try to do an experiment related to electricity inside a train and tell if the train is moving or is at rest.

7 years ago
										Is that it I've heard that there's a whole book on this topic and it's beyond the scope of a 12th student
7 years ago

Post Your Answer

Other Related Questions on General Physics

A body, having kinetic energy k, moving on a rough horizontal surface, is stopped in a distance x. The force of friction exerted on the body is (1) k x (2) k x (3) k x (4) kx
You no longer have to wait desperately for someone to help resolve your doubt. You can chat with IITians live, 24/7 (even at 3AM!) and get your doubt resolved instantly. Try the HashLearn...
Ankit 3 months ago
From Work Energy Theorem, Wtotal = change in kinetic enrgy -f*x = 0 – k f = k/x is the required friction force.
Vikas TU 3 months ago
Am I right that planets tend to be generally spherical? (Not perfect spheres, of course, but for the most part sphere-like). Why is this? Your explanation of how/why fire manifests as sphere...
Which resource used to be greatly consumed by the photo processing industry before the age of digital photography?
rahul kushwaha 27 days ago
Yes you are correct about planets being generally spherical. Keep in mind that gravitational force acts on all the matter on the planet and pulls it in the shape of circle. Also planets...
Manas Shukla 27 days ago
@ rahul what exactly u want to know ?? your ques are not clear that much , i think u want to know why the shape of the planet is spherical and not cylindrical or cubical ?? if so, then here ...
Umakant biswal 27 days ago
A ball is thrown vertically upwards from the top of a tower with a speed of 100m/ strikes the pound near the base of the tower after 25sec . The height of the tower is
Hi let us suppose the total height of the tower =h and hence by appling the equation of motion s=ut+(1/2)*a*t 2 by substituting the vaues (–h) = 100*25 + (1/2)(–g)(25) 2 (taking above as...
Ankit Jaiswal one month ago
on taking g as 9.8 our answer will be 562.5m plz approve both if u found them helpful thanks.....................................................
Ankit Jaiswal one month ago
The ball would reach at top of tower at time, T = 2u/g = 2*100/10 = 20 s. that means to cover the height it take 5 seconds. velocity at the top of tower on returning would be: v =100 – g*20 ...
Vikas TU one month ago
A body is giving 10^9 electrons in one second to another body. What time will it take to give 1 coulomb of charge ?
1ev=1.6e-19 that means 0.625e19 gives 1c charge and according to given question in 1sec e10 electrons are ejected which implies ot takes .625e10 sec to give one cloumb of charge
2017 years ago
In the isothermal expansion of 10g of gas from volume V to 2V the work done by the gas is 575J. What is the root mean square speed of the molecules of the gas at that temperature ?
In isothermal expansion work done is given as: W = nRTln(Vf/Vi) = nRTln(2v/v) = nRTln2 575 = nRTln2 T = 575/nRln2......................(1) Root Mean Square Method: Vrms =...
Vikas TU 2 months ago
Please tell why induced electric field form closed loop.
@ gagandeep . frst understand what exactly induced electric field means . that means the e.f that is induced by a charged object to a uncharged object . suppose u have a uncharged conducter ...
Umakant biswal 2 months ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,750 off

  • Kinematics & Rotational Motion
  • View Details

Get extra R 150 off

More Questions On General Physics

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details