a tennis player uses a strobe lamp to measure the speed of his serves. The lamp flashes every 1/100 of a second. A camera records the ball moving 31cm between flashes. what is the speed of the ball in m/s?

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a tennis player uses a strobe lamp to measure the speed of his serves. The lamp flashes every 1/100 of a second. A camera records the ball moving 31cm between flashes. what is the speed of the ball in m/s?

Mathematics
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v = delta x / delta t delta t = 1/100 s delta x = 31 cm m/s -> 100cm : 1 m .31/(1/100) = 31m/s I'm pretty sure. I took ap physics b last year, this is pretty basic kinematics.
thanks :) this was a little advanced for a 7th grader like me :(
no problem :) i miss 7th grade physics :p

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