Question

a car accelerates from rest to a speed 36km/h in 20s
find the acceleration of car in m/s² step by step​

Answer 1

$\underline{ \underline{\large\green\maltese \large{ \bf \red{Given:-}}}}$

$\large\bull$Initial Speed,u = 0

$\quad\quad\quad\quad\quad\quad$$\sf(Body \:was\: at \:rest\: initially)$

$\large\bull$Final Speed,v = 36 km/hr

$\quad\quad\quad\quad\quad\quad\quad$=10m/s

$\large\bull$Time period,t = 20s

$\underline{ \underline{\large\purple\maltese \large{ \bf \orange{To\: Find:-}}}}$

$\large\star$Acceleration,a in m/s²

$\underline{ \underline{\large\blue\maltese \large{ \bf \green{Solution:-}}}}$

By First Equation of motion-

$\pink { \underline { \boxed{ \sf{v - u = at}}}}$

$: \implies$$\sf a =\frac{v-u}{t}$

Putting Values-

$\large↦$$\sf a =\frac{10-0}{20}$

$\large↦$$\sf a =\frac{10}{20}$

$\large↦$$\sf a =\frac{1}{2}m/s^2$

$\boxed{\sf\red{So, \:The\: Acceleration\: of\: car\: is\: \frac{1}{2}m/s^2}}$

━━━━━━━━━━━━━━━━━━━━━━━━━━

Note- To Convert km/hr into m/s, simply multiply number by $\large\frac{5}{18}$

━━━━━━━━━━━━━━━━━━━━━━━━━━

Answer 2

Answer:

$\underline{ \underline{\large\green\maltese \large{ \bf \red{Given:-}}}} \\ </p><p></p><p>\large \: ∙ Initial \: Speed,u = 0 \\ </p><p>\quad\quad\quad\quad\quad\quad \sf(Body \:was\: at \:rest\: initially) \\ </p><p></p><p>\large∙ Final \: Speed,v = 36 km/hr =10m/s</p><p> \\ </p><p>\large\bull \: Time \: period,t = 20s</p><p>$