Fig. 17.If the particle be situated anywhere within the shell theattraction is zero. Hence it follows that the attraction of a sphere made upof shells, each of uniform density, on a particle outside is the 14 SYLLABUS OF same as if the mass of the sphere were concentrated at itscentre ; whilst its… … Fig. 18. 40. The efiect of setting a sphere rotating round a diameteris to introduce on a surface particle central forces tending towardstlie axis (Art. 13). Hence, at the equator if mg represent theweight of a body, R the reaction of the earth, v the velocity ofthe body and r the earths radius, 9…
Mechanics
Internet Archive · Western University Libraries · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten10unit-425-299.webp)
