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Question Number 136105 by I want to learn more last updated on 18/Mar/21

Commented by mr W last updated on 18/Mar/21

$$bookiswrong!$$$$justthink:canamanthrowastone$$$$177mtill420mhigh?evennota$$$$cannoncan,ithink!$$

Commented by I want to learn more last updated on 18/Mar/21

$$\mathrm{Thanks}\mathrm{sir}.$$$$\mathrm{I}\mathrm{used}:{\mathrm{v}}^2={\mathrm{u}}^2-2\mathrm{gh},0={\mathrm{u}}^2-2\mathrm{gh}$$$$\mathrm{I}\mathrm{used}\mathrm{H}=\frac{{\mathrm{u}}^2}{2\mathrm{g}}=\frac{8^2}{20}=\frac{64}{20}=3.2\mathbf{m}$$$$\mathrm{Am}\mathrm{i}\mathrm{right}?$$

Commented by mr W last updated on 18/Mar/21

$$clear!$$

Commented by I want to learn more last updated on 19/Mar/21

$$\mathrm{Thanks}\mathrm{sir},\mathrm{i}\mathrm{appreciate}.\mathrm{Am}\mathrm{happy}\mathrm{i}\mathrm{got}\mathrm{it}.\mathrm{Thanks}\mathrm{for}\mathrm{your}\mathrm{help}\mathrm{sir}$$

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