EFFORT, ACCELERATION, AND VELOCITY DIAGRAMS 291 
_ The acceleration / is calculated from the formula f= sare 
__ The mean acceleration during any interval is half the sum of the 
accelerations at the beginning and end of the interval. 
__ The increase in the velocity during any interval is the mean accelera- 
tion during the interval multiplied by 2, the length of the interval in 
The velocity v at the end of any interval is the sum of all the interval 
_ increases of velocity up to and including that interval. 
The mean velocity during any interval is half the sum of the velocities 
at the beginning and end of the interval. 
__ The distance moved during any interval is the mean velocity during 
_ the interval multiplied by 2, the length of the interval in seconds. 
, The distance moved from the start at the end of any interval is the 
_ sum of all the distances ‘moved during the intervals up to and including 
that interval. 
0712-7207 “sy 
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- 7 7 7 by : s 
004 10-4 600 br L928 
y a $ 2 Qa I --8 
| “Seo § 84.4480 SX, ‘ 7° 
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. 5 iS. 1. r BE 6 
i 4 3 6+) "360 > y Lists 
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a 4244 , v- 
q 48 ~ ee: Ha § 
j 20- S 2- 120 L Spr rs 2 3 
{ Pi as 
- i. 8 
ia ee me og 
oe Fe eG OOS 12 14716... 18). -20 
4 Time in seconds 
Fig, 455. 
4 
; Se Hog 
| oS —+.9 
$10] 600 7 Be oe a 
Ro g480 BN Veloce 78 
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& LN Q 
& 6 Ned eal ele . Let 5S 
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> $240 7 reg 
S24 120 is 5 
hoop 0 2 
0 12 24 36 48 60 72 64 96 108 120 
Space in feet. 
Fia. 456. 
The results are shown plotted on a time base in Fig. 455, and F, 7, 
and v are shown plotted on a space base in Fig. 456. 
