Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Ghost.
every moving object experience three phenomenon length contraction, time dilation, and increase in inertial mass when observed from any other inertial frame, observing this phenomenon depends upon v/c ratio and accuracy of measuring instruments. when earth was hit by gravitational waves back in 2015 eath got squizzed and expanded by size of sub atomic particles, but we didn't observe it physically but observed by LIGO, in a similar manner every moving object experience these 3 phenomenon w.r.t observer and it is called relativistic effects. in a nutshell when kinetic energy of the body is comparable to rest mass energy then relativistic effects come into play as in a case of particle accelerator, electrons orbiting nucleus and many other examples. Hope it helps.