Question

A car increases its speed from 36 km/h to 90 km/h in 5 seconds. Its acceleration is

Answer 1

Answer:

Step-by-step explanation:

a = v-u/t      (90(5/18)=25m/s) , (36(5/18)=10m/s)

a = 25-10/5

a=15/5

a=3m/s²

Answer 2

answer is 3m/s²

solutions:-. initial speed = 36km/h

final speed = 90km/h

convert the speed to meter / sec

36km = 36000m

90km = 9000m

convert an hour to sec = 1 h = 3600 sec

speed = d/t

so, 36000/3600 = 10m/s²

speed (ii). 90000/3600 = 25m/s²

so, 25m/s² - 10m/s²

=. 15m/s²

time of change = 5 sec

acceleration= 15m/s² / 5s

=. 3 m/s²