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The property of an object that determines how much it responds to a force in Newtonian mechanics, and how much it interacts with gravity in the Newtonian framework. Mass also refers to the intrinsic energy of a particle in particle physics. This tag does also cover effective mass.

1 vote
2 answers
73 views

Are the accelerations the same at either end of a moveable pully? [closed]

Given a moveable pulley with a fixed pulley on either side, Is the acceleration of the left weight (m1) the same as that of the right weight (m2)? Intuitively, I would imagine it to be, since if m1 d …
David Callanan's user avatar
24 votes
6 answers
7k views

Why was the neutrino thought to be massless?

Wolfgang Pauli once said (regarding the neutrino): I have done a terrible thing. I have postulated a particle that cannot be detected. Why did he figure it couldn't be detected? Was this because he …
David Callanan's user avatar