Question

A bus decrease its speed from 80 km ${h} ^{-1}to 60 km {h} ^{-1}in 5 s$. Find the acceleration of the bus. ​

Answer 1

$\huge{\pink{\green {\sf\boxed{ANSWER= -1.11m\:{s}^{-2}}}}}$

$\huge{\pink{\sf\underline\red {SOLUTION}}}$

Here, we have

$u=80 km\:{h} ^{-1}$

$=\frac{80*1000}{60*60}=22.22m\:{s}^{-1}$

$v=60 km {h} ^{-1}$

$=\frac{60*1000}{60*60}=16.67m{s}^{-1},$

${t} =5s$

$\bold{\red {\sf\underline {Therefore\:acceleration}}}$

${a}=\frac{v-u}{t}$

${a}=\frac{16.67-22.22}{5}=\frac{-5.55}{5}$

$\bold{\pink{\green {\sf\boxed{=1.11m\:{s}^{-2}}}}}$

$\Large\boxed{SOLVED}$

Answer 2

Answer:

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