A ball kicked horizontally at 10.0m/s from a cliff 80m high. How far from the base of the cliff will the stone strike the ground?
"h(t)=H-\\frac{gt^2}{2}=80-4.9t^2"
"h(t)=0 \\to 80-4.9t^2 \\to t=\\sqrt{\\frac{80}{4.9}}=4.04 s."
"S=vt=10*4.04=40.4m."
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