Traditional Culture Encyclopedia - Photography major - Stroboscopic photography is a common experimental method to study the motion of objects. Photography is done in a dark room, the camera is fixed on the ground and the shutter is always open.
Stroboscopic photography is a common experimental method to study the motion of objects. Photography is done in a dark room, the camera is fixed on the ground and the shutter is always open.
(1) As can be seen from the figure, in the same time, if the distance of an object is longer and longer, the object will accelerate.
(2) As can be seen from the figure, there are five intervals between A and F, so TAF = 5× 0.2s =1s;
sAD=4.5cm，tAD=0.2×3=0.6s，vAD = sAD tAD = 4.5cm 0.6s = 7.5cm/s；
sDF= 12.5cm-4.5cm=8cm，tDF=2×0.2s=0.4s，vDF=sDFtDF=8cm0.4s=20cm/s，
sAF= 12.5cm，vAF = sAFtAF = 12.5cm 1s = 12.5cm/s。
So the answer is: (1) acceleration; (2) 1s； 7.5; 20; 12.5.
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