Man Calculating Ball Speed with Stopwatch and Clipboard.
Schlüsselwörter
man,
calculating,
speed,
ball,
stopwatch,
clipboard,
measuring,
distance,
motion,
physics,
science,
experiment,
research,
analysis,
datum,
measurement,
time,
velocity,
kinetic,
energy,
movement,
track,
meter,
scale,
black,
white,
illustration,
drawing,
vignetting,
figure,
silhouette,
isolated,
concept,
idea,
study,
observe,
record,
note,
assessment,
evaluation,
test,
trial,
examine,
investigate,
explore,
discover,
learn,
cognition,
education
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