# Solve 2nd question

2.

$given,\phantom{\rule{0ex}{0ex}}u=5m/s\phantom{\rule{0ex}{0ex}}v=10m/s\phantom{\rule{0ex}{0ex}}s=50m\phantom{\rule{0ex}{0ex}}i)weknow,\phantom{\rule{0ex}{0ex}}2as={v}^{2}-{u}^{2}\phantom{\rule{0ex}{0ex}}\Rightarrow 2\times a\times 50={\left(10\right)}^{2}-{\left(5\right)}^{2}\phantom{\rule{0ex}{0ex}}\Rightarrow 100a=100-25=75\phantom{\rule{0ex}{0ex}}\Rightarrow acceleration,a=\frac{75}{100}=0.75m/{s}^{2}\phantom{\rule{0ex}{0ex}}ii)acceleration,a=\frac{v-u}{t}\phantom{\rule{0ex}{0ex}}\Rightarrow t=\frac{v-u}{a}\phantom{\rule{0ex}{0ex}}\Rightarrow t=\frac{10-5}{75}=6.67sec\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}\phantom{\rule{0ex}{0ex}}$

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