INDEX. 



379 



Eelative, Coordinates, 39, 102 ; Motion, 

 39, 40, 154, 184, 263, 293, 298, 305, 

 355 



Resistance, 115 



Resisting- medium, 195 



Restitution, 259; between rigid bodies, 

 271 



Rigid Body, Force applied to, 89, 112; 

 general motion of, 111 ; in two dimen- 

 'sions, 227, 236; impulses applied to, 

 269; initial motion of, 282; oscilla- 

 tion of, 289 ; energy and momentum, 

 297 



Rolling, 239, 241 



Rotation, of frame, 184, 186, 298, 363; 

 of rigid body, 227, 233 ; of the Earth, 

 351 



Screw, right-handed, 19 

 Second, Mean Solar, 3, 368 

 Seconds Pendulum, 179 

 Sliding, 115, 239, 272 

 Speed, 33 



Spheres, impact of, 258, 259, 261, 274 

 Spring, 121 ; Potential energy of, 132 

 Stability, of circular orbit, 68 ; of equi- 

 librium, 288; of steady motion, 295 

 Strain, 116, 122 

 Stress, 116, 122; in a rod, 246 



String, 119, 301; elastic, 120, 293; 

 Potential energy of, 131 



Tension, 119; of extensible string, 121; 



of chain at place of discontinuity, 301 

 Thread, 120 



Time, Measurement of, 3, 366 

 Traction, Surface, 118 

 Trajectory, 32 

 Translation and Rotation, Independence 



of, 108 



Uniformity of Nature, 1 



Unit, of time, 3; of velocity, 33; of 



acceleration, 34; of mass, 98 

 Units, Systems of, 374 



Vectors, Definition of, 8; Composition 

 and Resolution of, 10, 15; Systems 

 of, 13, 27, 28; Localised, 16; in 

 parallel lines, 23 *' 



Velocity, Definition of, 30, 32; ter- 

 minal, 196, 200 ; of rigid body, 232 ; 

 relative to rotating frame, 299 



Virtual Work, 139 



Weight, 94, 352 



Work, Definition of, 123; of internal 



forces, 128 

 Work Function, 125 



CAMBRIDGE : PRINTED BY J. AND C. F. CLAY, AT THE UNIVERSITY PRESS. 



