536 . APPLIED MECHANICS 
9. X=11°8 outwards; Y=8'0 inwards; Z=6'7 outwards; force in A 
compression. 
ia. i 
14. Total thrust in top member=71°67 ; thrust in BJ, DL, EM, and FN: 
thrust in CK=20; tension in AJ and HN= 11'78; tension in AK= 
tension in AL and "HL=15'81 ; tension in HK = 27°49; tension in AM= 
tension in HM=14'91; tension in AN and HJ=8'50. 
16. ‘l'otal thrust in "top member=67°2; thrust in BF and DK=8; thrust | 
CH=16; thrust in EL=32; tension in AF, CF, CK, and EK=5:12; "tensi n in 
AH and EH =15°09 : tension in AL=53°64, — 
XVI. pp. 278-282. 
2.0=¢. 5. 1in7‘11. 7. 37,600; 5600. 8. 396; 454°9. 
9. 24°6. 10. 20°48, neglecting difference between length and base of p! 
12. (1) 0°30; (2) 0°26 ; (3) 0°24. 
bo 
_- 
13. | d 4 es 14 9 o4 a q 
| me. % | 257 | 28 | 182 | 183 | 166 | 159 | 1468 
14. 32°3 Ibs.; 36°8 per cent.; 8°2 lbs. 15. (1) 22,620; (2) 3343. 
16.0°193, © 1%.°71°2.3°1°68) 18. (1),51°6 Ibs.; (2) 48°5 lbs. 
19. To raise W, (a) 207 Ibs. ; (6) 203 lbs.; to lower W, (a) 1931 Ibs. ; (0) 
lbs. 20. (a) 203°6 lbs. ; (b) 196°5 lbs. 
21. (1) P=550 Ibs. ; (2) P=598 ite. ; (1) R=1260 lbs. ; (2) R=1291 Ibs, 
23. (a) 4885 lbs. ; (6) 4603 lbs. . 515 Ibs. 25. 0°34, 
26. 135°7, 27. 352°3, 28. 7-1. oN 128 Ibs, 
30. 0:00066 Ib. ; 0°0264 ; 37°7:1. 
31. Horse- -power= 1866 K, if V is in feet per second. 
32. 257 lbs. ; 39 lbs. 33. 1174 lbs. ; 8:5 lbs. 34. 0°22, 
35. 34. 36. (a) 215 lbs. ; (b) 497 Ibs. 
XVIIa. pp. 294-296. 
1. 98; 63°91 lbs. 2. 128 ft.-lbs.; 10°15 feet per second ; 11 feet per second, 
3.1411. 4. Mean pressures, (a) 99; (b) 99°25 (c) 95° 4 for forward § 
and 103 for return stroke. 
5. 60°5 feet per second. 6, 2°48. 7. 2°8. 8. 28°09 feet per second. 
9. 1:21. 10. Velocities: 19; 30; 36; 39. Accelerations: 8; 1°4; 0°9 
11. When ¢=0°075 second, angular velocity =8°3, and angular accele 
=17'4; 8679 ft.-lbs. P 
12. I.: (a) 6%; (b) 2°32; (c) 84; (d) 0°644. II.: (a) 10; (6) 4°01; (c) 5; 
1°93. III.: (a) 134; (0) 6° 55; (c) 68; (d) 4°51, 
13. (a) 10°72; 5 (6) 4°23 ; (c) 4; (d) 1°07. 
14. x=10, v=25°43.; 2=30, v= 42: 15; *=50, v=51'5; «=70, v= BT'B4 5 
x=45 to x=55, time= 6-194 second ; from x=0 to ¢= 75, time = 2°24 secon 
15. Stops at 18°2 feet ; time from start to stop, 1°92 seconds. 
16. Time average of force=262"4 Ibs. ; Space average of force=267°9 Ik 
average velocity = 12°73 miles per hour; distance =653'5 feet. 
17. Length of stroke, 9°46 feet ; time for up stroke, 1°12 seconds, 
XVIIb. p. 299. 
1. 1226 lbs. 2. 0°495 second. 3. 3°25 1bs. 4. 1°107 seconds. "1 4 
5. 612 inches. 6. 2°06 seconds, 7. 289. 8. 2°972 in lb. and foot units. ~~ 
