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simple PHYISCS

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A teenager accidentally falls off a 10 m high platform diving board. His friend whips out his camera and takes a picture when the teenager is halfway to the water below to commemorate the embarrassing event and post it on Facebook. How many seconds after the teenager fell off did his friend take the picture?

  • simple PHYISCS - ,

    h=gt²/2
    t=sqrt(2•5/g)=1.01 s

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