Wauchope, Joseph Alliene, 1873- · Chicago, Scott, Foresman and Company · leaf 14
ions.— Repeat Experiment No. 2, usingthe wheel and axle deviceinstead of the pulleys.Obtain results as in thepreceding experiment andcalculate the efficiency ofthe machine. Discussion.—Is it neces-sary to measure the dis-tances moved? Why? Whatelse might we measure?How improve wheel andaxle to get… … EXPERIMENT No. 4 Question.— Does it require less work to lift a stonewith a crow bar than to raise it directly by handthrough the same height? Mechanics 13 Apparatus.— Lever; iron block weighing severalpounds; a pail; shot. Remarks.—Work is expressed in foot-pounds and isdetermined by multiplying…
Physics
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