Question

A car aqquires a velocity of 72 km/hrs in 10 seconds starting from rest.Find (a)the acceleration (b)the average velocity and (c)the distance travelled in this time

Answer 1

72 is the correct answer for this question

Answer 2

firstly you change its unit 72km/hrs
72×5/18=20m
u=0
v=20
t=10
a=?

a=v-u/t
a=2

find average velocity
a.v = v+u/2
a.v = 20/2
= 10

find distance
s is denoted by distance

s = ut+ 1/2 at×t
= (0)10+1/2×2×10×10
= 100m