Physics 62.1 Understanding Space, Time & Relativity (8 of 55) Einstein's Brilliant Insight 2

In this video I will explain Einstein's brilliant concept that 2 volleyball players cannot notice any difference whether they play volleyball (g=98m/s^2) on Earth or on a space ship accelerating at a=g (g=98m/s^2).

Next video in this series can be seen at:

[The_man_himself_]

If velocity is relative then so must be acceleration. The spaceship accelerates at different rates to different observers but it only feels one force. How come?

[charlesbrightman]

What exactly is 'gravity' and how exactly does it do what it does ?

[aqeelshah]

Professor if an object is moving with acceleration " g " just like here the acceleration of spaceship then the Frame of reference will be inertial or non inertial ?

[mathieubuisson]

When you say the spaceship is accelerating in deep space what is it accelerating with respect to ?