DR GARY SETTLES / SCIENCE PHOTO LIBRARY DR GARY SETTLES / SCIENCE PHOTO LIBRARY
Bouncing ball. Stroboscopic photograph of a bouncing tennis ball. The trajectory of the bounce closely approximates to a parabola. Strobe photography may be used to analyses the dynamics of the bouncing ball; it may be shown that the horizontal speed is almost constant whilst the vertical speed is similar to simple periodic motion.
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