Launch TrackerJS Website


For Teachers

- video-1447943685.mp4.mp4

Software Requirements


Android iOS Windows MacOS
with best with no no need Java
need Java
support full-screen? no no Yes Yes
cannot work on no mobile browser  understand Java....
no mobile browser  understand Java.... install Tracker from
install Tracker from



end faq

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video: Tewarit Yookung Khanmolee
model: lookang
assumptions made:
video fps =230
girl is 1.5 m tall
basketball is 0.27 m diameter


Technique used:

a moving reference frame to help compensate or account for the shaky camera
video detected as 30 fps, i adjusted it until the value of acceleration is roughly -9.81 m/s^2


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