An athle run with speed of 12m/s .Determine the longest jump he can take. Solve with complete explanation.
"l=\\frac{v^2 \\sin 2\\alpha}{g},"
"l=l_{max}~\\text {if }\\sin2\\alpha=1~(\\alpha=45\u00b0),"
"l_{max}=\\frac{v^2}{g}=\\frac{12^2}{9.8}=14.7~\\frac ms."
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