Word: frictionless
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...Diaries of Lewis Carroll [TIME, March 29]: please, either tell me where I can buy a frictionless pulley, or give me the answer to the Rev. Charles Dodgson's puzzle.* NELL COUFAL Omaha ¶As the Rev. Charles Dodgson (Lewis Carroll) supplied no answer to his own puzzle, see below for one reader's solution...
...solution seems obvious. As long as the monkey merely hung onto the rope, both the monkey and the equivalent weight would be at rest: the resultant of forces exerted on the rope would be zero . . . But since we have a frictionless pulley, and since the problem was posed by that eminent mathematician, Charles Dodgson (Lewis Carroll), there would doubtless occur what is known in scientific circles as the Cheshire Cat Effect: both the monkey and the weight would disappear into the substance of this marvelous pulley-monkey tail last-and never be seen again. Q.E.D. ("Damned Queer Effect...
...Given a monkey and an equivalent weight, one at each end of a rope running frictionless over a pulley attached to the ceiling, what would happen if the monkey tried to climb up the rope...
...most turn-sensing purposes, gyros work well enough, but they have serious faults. Neither the bearings on which they spin nor the gimbals on which they are suspended can be made entirely frictionless, and friction hurts their accuracy. So designers have longed for a turn-sensing instrument with no friction-plagued parts...
...there were traits of his which, as one looks back on them, become significant. He had a force of personality which was latent and which subsequent occasions would call out. He liked people, and he made them instictively like him. Moreover, in his geniality there was a kind of frictionless command...