Question

A car increases its speed from 20 km/h to 50 km/h in 20s, its acceleration is

Answer 1

Hey mate here is your answer ⤵⤵⤵

We have to use

$\bold {\boxed {v=u+at}}$

Now.,Here,

We have to convert km/h to m/s

v=Final velocity=50 km/h=50×$\frac {5}{18}$=13.88 m/s

u=Initial velocity=20 km/h=20×$\frac {5}{18}$=5.55 m/s

And t=20seconds

Now putting the values in the formula

v=u+at

$\implies$v-u=at

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

$\implies$$\frac {13.88-5.55}{20}$=a

$\implies$$\frac {8.33}{20}$=a

$\implies$a=0.416 $m/s^{2}$

❤hope it helps you ❤

♠Thanks for question♠

Answer 2

v = 50*5/18 = 13.88

u = 20*5/18 = 5.55

t = 20 seconds, using v = u + at , we get,

v - u/t = a ,

13.88 - 5.55/20 = a ,

8.33/20 = a,

0.4165 m/sec = a