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Question Number 180919 by anne1344 last updated on 19/Nov/22

Answered by Socracious last updated on 19/Nov/22

$${\mathrm{V}}_{\mathrm{r}}=\sqrt{{\left({4\mathrm{ms}}^{-1}\right)}^2+{(7.{0\mathrm{ms}}^{-1})}^2}$$$$=\sqrt{\left(16\right)+\left(49\right)}\frac{\mathrm{m}}{\mathrm{s}}$$$$=\sqrt{65}\frac{\mathrm{m}}{\mathrm{s}}$$

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