Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

382 moleswokth's pocket-book Gravity. N = Number of seconds. S = Space fallen through in feet. . V = Velocity in feet per second, acquired in N seconds, or 8 space. V = NX 32-2. __ V = V S X 64-4 = 8-025 V S. S = N2xl6’l. . These formulae are approximate, varying with the latitude and elevation. See next page. Table of Velocity of Falling Bodies. Time in seconds . 1| 2 3! ft! 61 »1 8| 9I 10 Space in feet .. 16 64 145 257 402 580 789 103Ü 1303 16Ü9 Velocity in feet) 32 61 , 1 96 129161 193 225 257; 290 322 per second .. J 1 1 1 Pt’ 1 ' ! Falling Bodies. Velocities due to Different Heights. Fall in feet. Velocity. Feet per second. Fall j in feet. Velocity. Feet i>er | second. Fall in feet. Velocity. Feet per second. 1 8 11 50 57 1 275 133 2 11-3 60 62 300 139 3 13-9 70 61 325 144 4 16 80 12 350 150 5 • 18 90 16 375 155 10 25 . 100 80 400 160 15 31 1 125 90 450 170 20 36 1 150 98 500 179 25 40 1,5 106 550 188 30 44 200 113 600 196 35 47 225 120 1 800 227 40 I 51 250 127 1000 254