MOTION OF PROJECTILES. 



71 



jected obliquely upwards in the direction A B with a 

 velocity of 24 m -5. A motion of 24 m> 5 in this direction 

 makes the body rise vertically upwards through 19 m> 6, 

 and move in the same time horizontally through 14 m *7. 

 The horizontal motion is uninfluenced by gravity, and 

 the body moves in each second laterally through 14 m< 7. 

 But the heights to which the body would ascend by the 

 velocity of projection after 1, 2, 3, 4 seconds are dimi- 

 nished by the spaces through which the body would fall 



FIG. 52. 



in these times by the action of gravity ; the successive 

 heights are therefore really :_ 



