Question

a car start from rest and ofter 20s its velocity become 180km/s find the acceleration of car​

Answer 1

Answer:180/20=90/9

Explanation:

velocity =speed/time so 180/20=90/9 because zero can be cut if you want you can cut.

Answer 2

Answer:

Given,

initial velocity, u = 0 m/s [ rest ]

final velocity , v = 180 km/s

=(180×1000)/3600 m/s

= 50m/s

time , t = 20 s

acceleration , a = to find

we know that,

$a = \frac{v - u}{t} \\ \: \: \: = \frac{50 - 0}{20} \\ \: \: \: = 2.5 \: \: m {s}^{ - 2}$