Question

An athle run with speed of 12m/s .Determine the longest jump he can take. Solve with complete explanation.

Answer 1

$l=\frac{v^2 \sin 2\alpha}{g},$

$l=l_{max}~\text {if }\sin2\alpha=1~(\alpha=45°),$

$l_{max}=\frac{v^2}{g}=\frac{12^2}{9.8}=14.7~\frac ms.$