ANSWERS 
II. pp. 21-23. 
1. 66; 3°75; 19; 8:2, 2 210; 1584; 1824; 2952°9. ~ 
3. 22°5; 35; 19; 29°83, 4. 31°42; 28°27. 5. 6O1'6. 6. 0°0432. 
7, 142. 8. 0°489. 9. 0°449. 10.6 seconds. 11. 14 feet per second. 
12. 93:9 feet. 13. 22°5 seconds. 14. 00675; 16°59. > 
15. 1343; 25°66 seconds, 16. 224; 23°47; 1°91, 
17. 26°64 feet per second at 41° 21’ to the vertical. 
18, 25° 37’ north of east; 3°889 miles per hour. a) 
19. 48° 15’, assuming that the man is approaching the line of flight of the 
object. 20. 17°32 feet per second. ~ ae 
22. B, 5'8 feet per second; middle point of AB, 3-2 feet per second, © 
23. 12°42 lbs. 24. 258°75 feet. 25. 3821 lbs. ; 4631 Ibs. 
26. 2 minutes 4°6 seconds ; 54°72 miles per hour. : a 
27. 2:1, feet per second per second ; 10°23 tons. 28. 8°93 feet per second. 
29. 10°93 Ibs. 30. 3°22 feet per second per second. a 
31. (1) 844°7 Ibs.; (2) 1000 Ibs.; (8) 1155°3 lbs. 33. 2020 Ibs. 
34, 488°13 ft.-lbs, 
IIIa. pp. 28-30. 
1. 40°594. 9. 5727°6. 3. 514°3. 4. 366,000, 5. 47,099. 6. 302,467. 
7. 18. 8. 130°2 ft.-lbs. 9. 6. 10. 2200 Ibs. 11. 992°3, 12. 226,286. 
13. 30°55; 22,790; 170; 0:0035. 14. 44°24; £840. 
15. 10°02 Ibs. ; 83°3 per cent., 56°4 per cent., 74°2 per cent. 
16. 85; 112°5; 0°437; 15°5 lbs.; 0°573. 17. See Fig. 841. 
= 10 
2 Meéch. Advantage = 30. F=8-57. 
tae Efficiency = 14°3 per cent. +4 
6 Max. Mech. Advantage =33-3. . 
a 5 
\Mase. Efficiency =15:9 per cent} |_+ 
i 
beet 
12 : —— > 
Atel 
Fe p24 Aca 
o 
\ 
P and F,in pounds. 
me © 
Efficiency per cent. 
vA 
vn 
Ul 
=|s 
ol|= 
+ 
> 
> 
“0 50 100. 150. +200. 250 + 300 
W, in pounds. 
Fie. 841. j 
18. Q=0°02W+1. 19. 22°45. 20, P=0-162W+2'8; maximum efficiency _ 
=38°6 per cent. 
21. p=1'25, ¢=5; efficiency =57°14 per cent. 
530 
