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Path: ...!fu-berlin.de!uni-berlin.de!news.dfncis.de!not-for-mail From: Luigi Fortunati <fortunati.luigi@gmail.com> Newsgroups: sci.physics.research Subject: Re: Free fall Date: 25 Mar 2024 08:14:06 GMT Organization: A noiseless patient Spider Lines: 21 Approved: hees@itp.uni-frankfurt.de (sci.physics.research) Message-ID: <utpmse$ftmn$1@dont-email.me> References: <uohagi$3qkfr$1@dont-email.me> <uoiv2o$5j55$1@dont-email.me> <B5icnd2muJr8bi74nZ2dnZfqlJ9j4p2d@giganews.com> <upaaa8$tf1s$1@dont-email.me> <yc6dnTUP9rIk0yT4nZ2dnZfqlJxj4p2d@giganews.com> <upd7b7$1fkpp$1@dont-email.me> <upihmb$2inms$1@dont-email.me> <upoi4g$3oedq$1@dont-email.me> <upsqa2$q4ss$1@dont-email.me> <upt7nk$seac$1@dont-email.me> <uptfcl$tse8$1@dont-email.me> <uq8b5f$38och$1@dont-email.me> <uqcror$1f11n$1@dont-email.me> <uqd833$1hvqa$1@dont-email.me> <usne96$3nrp6$1@dont-email.me> <utcp0o$10dvf$1@dont-email.me> Reply-To: fortunati.luigi@gmail.com X-Trace: news.dfncis.de 7y1lbqQjb8jJFU9vn9F+cgop+XNRKkv5dop3hE5gn9TQlyEL3npF21+31mRVUkxrs8 Cancel-Lock: sha1:/DC8pjt5rQb/Q2I26bq83BhwTeQ= sha256:clSf6w9bV0o3sSXWIGaL5ZKWjx7cx/UYTH3AABz+lxE= Bytes: 1901 Luigi Fortunati il 21/03/2024 17:13:41 ha scritto: > What makes gravitational forces different from non-gravitational forces? > > Luigi Fortunati > > [[Mod. note -- That's a very good question! > > That is, the gravitationalforce on a body with inertial mass 2 kg is (a) precisely twice that on a body with inertial mass 1 kg, and (b) the *same* independent of the composition of the body. > -- jt]] It is certainly true the (b) which makes gravitational forces different from non-gravitational ones. But (if I'm not mistaken) (a) also applies to the electromagnetic force which, on a 2 gram body of any material X, is exactly double that on a 1 gram body of material X. Is that so? Luigi Fortunati