A laboratory manual in physics, to accompany Black and Davis' "Practical physics for secondary schools," (1913)
Black, Newton Henry, 1874- [from old catalog] · New York, The Macmillan company · leaf 26
ch weighs 70 lb. and which has its center ofgravity in the middle. If he sits 1 ft. from one end, howfar from this same end must the fulcrum be placed in orderto balance ? PARALLEL FORCES 11 EXPERIMENT 5 PARALLEL FORCES What two conditions must always exist in order to have parallelforces in… … Fig. 6 ous points, fasten the spring balances to these cords, andarrange the table clamps so that the meter stick is aboutparallel to the edge of the table and so that all forces areparallel. 12 LABORATORY MANUAL Tighten the cords attached to F2 and Fs until the balancesindicate 1000 g. and 1500 g.…
Physics
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