A student released a ping pong ball in front of a metre rule and used a phone camera to record the motion of the ball as it fell. The phone camera captures 60 images per second, which may be played back one image at a time.
The ball was dropped from a height such that it reached its terminal velocity as it passed the metre rule.
(4)
(2)
This experiment could have been attempted using a stopwatch to measure the time as the ping pong ball fell.
Explain an advantage of using a phone camera rather than a stopwatch.
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