Roper's catechism for steam engineers and electricians .. (1899)
Roper, Stephen. [from old catalog], Keller, Edwin R., [from old catalog] ed, Pike, Clayton W., [from old catalog] ed · Philadelphia, D. McKay · leaf 37
m of the lever. Q. What is the relation between the appliedforce and the resulting force in the case of a wedge ?A. If a force of F pounds be applied at thepoint B in the direc-tion B A, the resultingforce W (in a directionperpendicular to A B)will have the follow-ing relation: W_ _ length A BF ~~… … STEAM ENGINEERS AND ELECTRICIANS. 17 A. Merely to change the direction of force. Q. What advantage is gained by a movablepulley ? A. It enables us to raise a weight by the appli-cation of a force half as great as the weight,although we take twice as long to do the work. Q. With two movable pulleys…
Steam engineering · Electrical engineering
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