Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 26
ances. 58. Rolling Friction is the friction of a body whenrolling along another. It is generally much less thansliding friction. Hence whenever possible, sliding frictionis changed by wheels to rolling. Both are diminished byusing lubricants, as oil, since these partially fill up theroughnesses of… … Suspend a glass or metal platefrom one arm of a balance, andplace sufficient ■weights in thepan on the other arm to balancethe plate. Now bring the un-der surface of the plate intocontact with water. Severalgrammes will be required toremove it, and when separated,Fig. 4. the under surface of the…
Physics
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