I'm trying to study for a physics test and I don't get this problem. Finding speed?

Ashley

New member
A 510N swimmer dives off a cliff with a running horizontal leap. What must her minimum speed be just as she leaves the top of the cliff so that she will miss the ledge at the bottom, which is 1.75m wide and 9.00m below the top of the cliff?

This problem has brought me to tears, i don't understand it at all.

Thanks in advanced
 
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