Question

a body covers 100 m in 5 sec. If the body starts from rest, what is the acceleration of the body?​

Answer 1

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8 m/s²

${\bf{\underline{\overline{\mid{Explanation:-}\mid}}}}$

•Body starts from rest so,

u=0 m/s

•time= 5s

•distance= 100 m

now,

acceleration:-

By second equation of motion:-

$\boxed{ \bf{s = ut + \frac{1}{2}at {}^{2} }}$

$\implies100 = 0 \times 5 + \frac{1}{2} a \times 5 {}^{2} \\ \\ \implies100 = \frac{25a}{2} \\ \\ \implies \: a = \frac{100 \times 2}{25} \\ \\ \implies \: a = \boxed{ \bf 8 \: ms {}^{ - 2} }$

•°•acceleration is 8 m/s²