Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 33
offering resistance to the free motion of thebodies. When the surfaces are covered witn a lubricant,their inequalities are filled and smoothed over and the fric-tion is lessened. Inertia Locomotive. lO EXPERIMENTAL SCIENCE. The friction developed by the sliding of one body uponanother is known as… … of many kinds of machinery are provided with roller or ballbearings, thus substituting rolling for rubbing surfaces. Anexample of bearings of this kind is found in the pedals andshafts of bicycles and tricycles, which are provided withball bearings. REST, MOTION, AND FORCE. ir CENTRIFUGAL FORCE.…
Physics · Lantern projection · Electric apparatus and appliances
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