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  4. A monkey can jump a maximum horizontal distance of 20 m. Then the velocity of the monkey is

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Q. A monkey can jump a maximum horizontal distance of $20\, m$. Then the velocity of the monkey is

Motion in a Plane

Solution:

$ R=\frac{u^{2} \sin 2 \theta}{g}$
$R_{\max }=\frac{u^{2}}{g}$ when $\theta=45^{\circ}$
$ \Rightarrow 20\, m =\frac{u^{2}}{9.8}$
$u=(20 \times 9.8)^{\frac{1}{2}}=14 \,ms ^{-1}$