Question

The car starts from the rest and moves with uniform acceleration. If it attains the velocity of 7.2km/hr in 5sec, calculate its acceleration.​

Answer 1

$initial \: velocity \: (u) \: = 0 \: \leadsto \color{aqua} { \underline{(because \: the \: body \: was \: at \: rest)}}$

$final \: velocity \: (v) \: = \: 7.2 \: \leadsto \: \color{lime} { \underline{(velocity \: at \: the \: end)}}$

$time \: (t) \: = \: 5 \: seconds$

$\color{gold} \: { \underline{Formula \: for \: acceleration \: = \: \large \frac{v - u}{t} }}$

$\large \color{silver}{ \underline{Putting \: the \: values \: :-}}$

$\large \frac{7.2 - 0}{5}$

$\large \frac{7 \cancel.2 - 0}{50}$

$\frac{72}{50} \large\leadsto \: 1.44$

$\large \color{cyan} { \underline{ \therefore \: Acceleration \: = \: 1.44 \: {m \: per \: s}^{2} }}$