A text book of physics, for the use of students of science and engineering (1918)
Duncan, John, d. 1941, Starling, Sydney George, 1873- · London Macmillan · leaf 114
be alteredby adjusting the length of BC,and the inclinations of EC and BCmay be changed by making use ofdifferent screw-eyes. Observe the spring balances andso find the push in the jib and thepull in the tie for different values of W and different dimensions of the apparatus. Check the results… … V7777777777777777777 Fig. 98.—Model derrick crane. 90 DYNAMICS CHAP. C merely changes the direction of the cord without altering the force init; hence P =W (Fig. 99 (a) ). The polygon of forces (Fig. 99 (b) ) is drawnby making ab represent W, and be represent P ; lines are then drawnfrom a parallel…
Physics
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